SINAMICS G120P Cabinet, 110 kW to 400 kW Siemens

Область применения

Variable-speed drives are ideal for all applications that involve moving, conveying, pumping, or compressing liquids or gases.

This means the following applications in particular:

• Pumps
• Fans
• Compressors

Обзор

SINAMICS G120P Cabinet drive inverter cabinet units, versions A and C

With its SINAMICS G120P Cabinet drive inverter cabinet units, Siemens is offering a drive system on which all line-side and motor-side components as well as the Power Module are integrated into a specially designed cabinet enclosure. This design minimizes configuring and installation expenditure.

SINAMICS G120P Cabinet has been specially tailored to meet the requirements of drives for pumps, fans and compressors with quadratic load characteristic that have medium performance requirements with no regenerative feedback capability.

The control accuracy of the sensorless vector control is suitable for most applications, and additional actual speed value encoders are therefore superfluous.

SINAMICS G120P Cabinet offers an economic drive solution that can be matched to customer-specific requirements using a range of available components and options.

There are two versions of the drive inverter cabinet units:

• Version A
  enables all optionally available line connection components, such as the main switch, main contactor, line fuses, line filter, motor-side components and additional monitoring devices to be installed
• Version C
  space-saving design with line reactor and optional main switch. This particularly slimline design can be used, for example, when line connection components are accommodated in a central low-voltage distribution panel (MCC) in the customer''s plant or system.

SINAMICS G120P Cabinet drive inverter cabinet units are available for the following voltages and outputs:

The units have degree of protection IP20 as standard. They are optionally available with degrees of protection IP21, IP23, IP43 and IP54.

Дизайн

SINAMICS G120P Cabinet drive inverter cabinet units are characterized by their modular and service-friendly design.

A wide range of options is available depending on the cabinet version, which permits optimum adaptation of the drive system to the respective requirements (see section Options).

Example of design of a SINAMICS G120P Cabinet drive inverter cabinet unit, version A with a CU230P-2 Control Unit

Basic design of a SINAMICS G120P Cabinet drive inverter cabinet unit with several essential options

Coated modules

The following inverter components are equipped as standard with coated modules:

• Power Modules
• Control Units
• Intelligent Operator Panel IOP

The coating on the modules protects the sensitive SMD components against corrosive gases, chemically active dust and moisture.

Nickel-plated busbars

All of the busbars used in the inverter cabinet are nickel-plated in order to achieve the best possible immunity to environmental effects. Further, the bare copper connections do not have to be cleaned for customer connections.

Note:

For some options, for technical reasons, parts of the copper busbars cannot be nickel-plated.

Crane transport aid

The inverter cabinet units are supplied with a crane transport aid mounted on the top. In the case of single cabinets up to a width of 1200 mm, transport eyebolts are provided to transport the unit by crane. Transport rails are used with cabinet widths >1200 mm or for several cabinets (e.g. option L01). Rope spreaders should be used for low crane hook heights.

Degrees of protection of cabinet units

The EN 60529 standard covers the protection of electrical equipment by means of housings, covers or equivalent, and includes:

• Protection of persons against accidental contact with live or moving parts within the housing and protection of the equipment against the ingress of solid foreign matter (touch protection and protection against ingress of solid foreign bodies)
• Protection of the equipment against the ingress of water (water protection)
• Abbreviations for the internationally agreed degrees of protection

The degrees of protection are specified by abbreviations comprising the code letters IP and two digits.

Характеристика

Derating data

SINAMICS G120P Cabinet units and the associated system components are rated for an ambient temperature of 40 °C and installation altitudes up to 1000 m above sea level.

At ambient temperatures of > 40 °C, the output current must be reduced. Ambient temperatures above 50 °C are not permissible.

At installation altitudes > 1000 m above sea level, it must be taken into account that the air pressure, and therefore air density, decreases as the height increases. As a consequence, the cooling efficiency and the insulation capacity of the air also decrease.

Due to the reduced cooling efficiency, it is necessary, on the one hand, to reduce the ambient temperature, and on the other hand, to lower heat loss in the inverter cabinet unit by reducing the output current.

As additional measure for installation altitudes from 2000 m up to 4000 m, an isolating transformer is required in order to reduce transient overvoltages according to EN 60664‑1.

Automatic adjustment of pulse frequency

In the factory setting, the drive starts with a pulse frequency of 4 kHz and reduces the pulse frequency automatically to the associated required frequencies when loaded. When the load decreases, the pulse frequency is increased automatically up to 4 kHz. The values of the rated current apply to a pulse frequency of 2 kHz and an ambient temperature of 40 °C and are reached at any time by the automatic adaptation of the output pulse frequency.

Current derating as a function of installation altitude

Permissible output current as a function of the installation altitude for SINAMICS G120P Cabinet units, frame size GX

Permissible output current as a function of the installation altitude for SINAMICS G120P Cabinet units, frame size HX

Note:

The connected motors and power elements must be considered separately.

Current derating as a function of ambient temperature

Permissible output current as a function of the ambient temperature

System operating voltage

The PM330 Power Modules supply a constant power over the full permissible range of line voltage.

Rated power as a function of the line voltage

The constant power results in current derating as a function of the line voltage.

Operating ranges

An additional dimensioning aid is available for all inverters with a PM330 Power Module. The purpose of this aid is to ensure the constant reliable operation of the inverter, in particular with regard to service life expectancy.

The dimensioning aid clearly distinguishes between continuous operating ranges and short-time operating ranges. As a result, due consideration can be given to operating ranges when the plant is configured. For further details, please refer to the diagram below and the explanatory text.

Continuous operation (green area) permissible.

Short-time operation (yellow area) permissible for 2 % of the total operating period without significant reduction in the inverter service life; no overload reaction triggered by the thermal monitoring model.

Sporadic short-time operation (red area) permissible for only very short, rare operating states lasting less than 0.1 % of the total operating period without significant reduction in the inverter service life; no overload reaction triggered by the thermal monitoring model on condition of compliance with the duty times specified in the diagram.

Overload capability

SINAMICS G120P Cabinet drive inverter cabinet units are equipped with an overload reserve to deal with breakaway torques, for example. If larger surge loads occur, this must be taken into account when configuring. In drives with overload requirements, the appropriate base-load current must, therefore, be used as a basis for the required load.

The unit can operate in two different duty cycles in the permissible continuous operating range shown in the diagram (green area). Depending on how the system is dimensioned, the relevant base-load current is effective as a rated quantity.

The criterion for overload is that the drive is operated with its base-load current before and after the overload occurs on the basis of a duty cycle duration of 300 s.

The base-load current for a low overload I_L is the basis for a duty cycle of 110 % for 60 s or 135 % for 3 s.

The base-load current I_H for a high overload is based on a duty cycle of 150 % for 60 s.

Overload capability, low overload

Overload capability, high overload

Функции

Intelligent Operator Panel IOP

The IOP (Intelligent Operator Panel) is mounted in the door of the cabinet units. It is used to operate and commission the drive system. The IOP is an extremely user-friendly, powerful operator panel.

The IOP supports both entry-level personnel and drive experts. Thanks to the large plain text display, the menu prompting and the application wizards, it is easy to perform commissioning. A drive can be essentially commissioned without having to use a printed parameter list – as the parameters are displayed in plain text, and explanatory help texts and the parameter filtering function are provided.

Application wizards interactively guide you when commissioning important applications such as pumps and fans. There is a basic commissioning wizard for general commissioning.

The drives are easily controlled manually using directly assigned buttons and the navigation wheel. The IOP has a dedicated switchover button to switch from automatic to manual mode.

The inverter can be diagnosed in a user-friendly fashion using the plain text display of faults and alarms. Help texts can be obtained by pressing the INFO button. Up to 2 process values can be displayed graphically or numerically on the status screen/status display. Process values can also be displayed in technological units.

The IOP supports standard commissioning of identical drives. For this purpose, a parameter list can be copied from an inverter into the IOP and downloaded into other drive units of the same type as required. This functionality is available only if a memory card is installed in the Control Unit.

The IOP supports the following languages ¹⁾: German, English, French, Italian, Spanish, Portuguese, Dutch, Swedish, Russian, Czech, Polish, Turkish, Finnish.

The operating temperature of the IOP is 0 ... 50 °C (32 ... 122 °F).

¹⁾ Further information is available at
http://support.automation.siemens.com/WW/view/en/67273266

Communication with higher-level control and customer terminal block

Depending on the selected CU230P‑2 Control Unit, the following interfaces for communication with the higher-level control system are provided:

• PROFINET, EtherNet/IP (option K96)
• PROFIBUS (option K97)
• USS/Modbus RTU/BACnet MS/TP, P1 protocol (option K98)
• CANopen (option K99)

The Control Unit can be connected to the higher-level control via its digital inputs and outputs.

Open-loop and closed-loop control functions

The inverter control contains a high-quality, sensorless vector control with speed and current controls as well as motor and inverter protection.

Software and protective functions

The software functions available as standard are described below:

¹⁾Factory setting: not activated (can be parameterized)

²⁾ This function requires an additional external circuit.

Конфигурация

Cable cross-sections and connections

The table below lists the recommended and maximum possible cable connections at the line and motor ends (versions A and C).

The recommended cross-sections are based on the specified fuses. They are applicable for 3-wire cables manufactured out of copper with PVC insulation, routed horizontally in air and a permissible wire temperature of 70 °C (e.g. Protodur NYY or NYCWY) for an ambient temperature of 40 °C and individual routing.

When the conditions differ from those specified above (cable routing, cable grouping, ambient temperature), the appropriate correction factors according to IEC 60364‑5‑52 must be taken into account.

¹⁾ The recommendations for the North American market in AWG or MCM should be taken from the appropriate NEC (National Electrical Code) or CEC (Canadian Electrical Code) standards.

Cable cross-sections required for connecting to the line supply and to motors

It is always recommended to use shielded - for higher power ratings - where possible symmetrical, 3-wire three-phase cables between the inverter and the motor, and where required, to connect several of these cables in parallel. There are essentially 2 reasons for this:

• Only then can the high IP55 degree of protection at the motor terminal box be easily achieved. The reason for this is that cables are routed into the terminal box through glands, and the number of possible glands is restricted by the terminal box geometry. Individual cables are less suitable in achieving this.
• With symmetrical 3-wire three-phase cables, the summed ampere-turns over the cable outer diameter are equal to zero. They can easily be routed in conductive, metal cable ducts or racks without any significant currents (ground current or leakage current) being induced in these conductive, metal connections. The danger of induced leakage currents, and thus of increased cable sheath losses, is significantly higher for single-wire cables.

The cable cross-section required depends on the current being conducted in the cable. The permissible current loading of cables is defined, for example, in IEC 60364‑5‑52. It depends on ambient conditions, such as temperature, but also on the routing method. It should be taken into account as to whether cables are routed individually and therefore relatively well ventilated, or whether groups of cables are routed together. In the latter case, the cables have significantly poorer ventilation and can therefore heat one another up more significantly. For the relevant correction factors applicable to these boundary conditions, please refer to IEC 60364‑5‑52.

The table below provides a guide to the recommended cross-sections (based on IEC 60364‑5‑52) for PVC-insulated, 3-wire copper and aluminum cables, a permissible conductor temperature of 70 °C (e.g. Protodur NYY or NYCWY), and an ambient temperature of 40 °C.

Current-carrying capacity according to IIEC 60364‑5‑52 at 40 °C

¹⁾A maximum of 9 cables may be routed directly next to one another horizontally on a cable tray.

Cables must be connected in parallel for higher currents.

Note:

The recommendations for the North American market in AWG or MCM should be taken from the corresponding standards NEC (National Electrical Code) or CEC (Canadian Electrical Code).

Grounding and protective conductor cross-sections

The protective conductor must be dimensioned taking into account the following data:

• In the case of a ground fault, no impermissibly high contact voltages resulting from voltage drops on the PE conductor caused by the ground fault current may occur (< 50 V AC or < 120 V DC, IEC 61800‑5‑1, IEC 60364, IEC 60543).
• The PE conductor should not be excessively loaded by any ground fault current it carries.
• If it is possible for continuous currents to flow through the PE conductor when a fault occurs, the PE conductor cross-section must be dimensioned for this continuous current.
• The PE conductor cross-section should be selected according to IEC 60204‑1, IEC 60439‑1, IEC 60364.

Note:

The recommendations for the North American market in AWG or MCM should be taken from the corresponding standards NEC (National Electrical Code) or CEC (Canadian Electrical Code).

Switchgear and motors are usually grounded separately via a local ground electrode. With this constellation, the ground fault current flows via the parallel ground connections and is divided. In spite of the relatively small protective conductor cross-sections used in accordance with the table above, no inadmissible touch voltages occur with this grounding system.
However, from experience gained with different grounding constellations, we recommend that the ground cable from the motor returns directly to the drive inverter. For EMC reasons and to prevent bearing currents – for higher power ratings – symmetrical, 3-wire, three-phase cables should be preferentially used instead of four-wire cables. For 3-wire cables, the protection or PE wire must be routed separately or arranged symmetrically in the motor cable. The symmetry of the PE conductor is achieved using a conductor surrounding all phase conductors or using a cable with a symmetrical arrangement of the three phase conductors and three ground conductors.

Through their high-speed controllers, the inverters limit the load current (motor and ground fault currents) to an rms value corresponding to the rated current. We therefore recommend the use of a PE conductor cross-section analogous to the phase conductor cross-section for grounding the control cabinet.

Особенности

• The inverters are exceptionally quiet and compact thanks to state-of-the-art IGBT power semiconductors, fan speed control as a function of temperature and reduced volumetric flow at the nominal working point.
• A rated switching frequency of 2 kHz, optimized pulse patterns and pulse frequency wobbling all help to reduce motor noise
• Individual modules and power components can be replaced quickly and easily, which ensures a higher level of plant availability. The design of replaceable components is based on the principle that they must be quick and easy to change. In addition, the "Spares on Web" Internet tool makes it easy to tailor the spare parts that are available to the task at hand (http://www.siemens.com/sow)
• Can be easily integrated in automation solutions by means of a standard communications interface on the Control Unit as well as a range of analog and digital interfaces
• Simple commissioning and parameterization via the IOP Intelligent Operator Panel or using the STARTER commissioning tool on a PC
• Preset software functions make it easier to tailor the inverter to the individual plant. For example, the key functions for controlling pumps are stored as a preprogrammed macro in the drive
• Regarding EMC, the units are sub-divided into various zones, and as a consequence, they are extremely insensitive to disturbances and are very reliable in operation. Detailed measurements and simulations have been conducted to determine the ideal positioning of air guidance and heat dissipation partitions
• Special measures used in the construction of the cabinets ensure that they remain mechanically durable over their entire lifecycle. All components, from individual parts to the ready-to-connect cabinet, undergo rigorous testing throughout the entire production process. This guarantees a high level of functional reliability during installation and commissioning, as well as in operation

Опции

Refer also to ordering examples for orders with order codes.

Available options	Order code	Version A	Version C
Control Unit (it is essential to specify one of these four order codes)
CU230P‑2 PN Control Unit	K96	✓	✓
CU230P‑2 DP Control Unit	K97	✓	✓
CU230P‑2 HVAC Control Unit	K98	✓	✓
CU230P‑2 CAN Control Unit	K99	✓	✓
Line-side options
Use in the first environment to EN 61800‑3 Category C2 (TN systems or TT systems with grounded neutral point) 1)	L00	✓	–
Clean Power version with integrated Line Harmonics Filter (380 ... 400 V ±10%)	L01	✓ 3)	–
Main contactor	L13	✓ 3)	–
Main switch, incl. fuses	L26	✓	✓
Motor-side options
dv/dt filter compact plus VPL (Voltage Peak Limiter)	L07	✓	–
Motor reactor	L08	✓	–
dv/dt filter plus VPL (Voltage Peak Limiter)	L10	✓	–
Motor protection and safety functions
EMERGENCY OFF pushbutton installed in the cabinet door	L45	✓	–
EMERGENCY OFF category 0, 24 VDC	L57	✓ 3)	–
EMERGENCY STOP Category 1, 24 V DC 2)	L60	✓ 3)	–
Thermistor motor protection unit (alarm)	L83	✓ 3)	–
Thermistor motor protection unit (trip)	L84	✓ 3)	–
Pt100 evaluation unit	L86	✓ 3)	–
Degree of protection increase
Degree of protection IP21	M21	✓ 4)	✓
Degree of protection IP23	M23	✓ 3)	✓
IP43 degree of protection	M43	✓ 3)	✓
Degree of protection IP54	M54	✓ 3)	✓
Mechanical options
Base 100 mm high, RAL 7035	M06	✓	✓
Cable compartment 200 mm high, RAL 7035	M07	✓	✓
Other options
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