SEW MOVIDRIVE UL compliant installation

SEW MOVIDRIVE ®  Complete guide for UL compliant installation and protection configuration of series frequency converters

In the field of industrial automation, electrical safety and compliance certification of driving equipment is a key link in system integration. SEW-EURODRIVE, as a global leader in driving technology, has its MOVIDRIVE ®  Series frequency converters are widely used in various industrial scenarios. To ensure that the product meets UL certification requirements in the North American market, SEW provides detailed technical data sheets covering core contents such as terminal torque, short-circuit current rating (SCCR), branch circuit protection, overload protection, environmental temperature derating, and braking resistance protection. This article is based on the official data manual (document number 20116144) and systematically reviews MOVIDRIVE ®  MDX60B/61B、MDR60A/61B、MDX62B、MOVIDRIVE ®  Compact and MOVIDRIVE ®  The UL compliant installation points for Class A products provide a detailed technical operation guide for electrical engineers and system integrators.

MOVIDRIVE ®  MDX60B/61B UL Compliance Detailed Explanation

1.1 Requirements for on-site wiring power terminals

According to UL standards, the wiring of frequency converter power terminals must use copper wires with specified temperature ratings:

MDX60B/61B 0005-0300 model: only uses 60/75 ° C copper wire

MDX60B/61B 0370-2500 model: only uses 75 ° C copper wire

The tightening torque of the terminals is strictly graded according to size to ensure the reliability and safety of electrical connections:

Size code torque (in lbs) torque (Nm)

0XS, 0S, 0L 5 0.6

1, 2S 5 0.6

2 13 1.5

3 31 3.5

4, 5 120 14

6 180 20

7 200 23

1.2 Short circuit current rating (SCCR)

The MDX60B/61B series is suitable for circuits that can provide symmetrical amperes up to 200000 rms, provided that fuse or circuit breaker protection is configured according to the table below. When using ABB or Rockwell Automation's Type E combination motor controller for protection, the SCCR is 65000 rms symmetrical amperes.

400/500V unit: maximum voltage limit is 500V

230V unit (model 0015-0300): maximum voltage limit is 240V

1.3 Branch Circuit Protection

Important note: The built-in solid-state short-circuit protection in the frequency converter cannot replace branch circuit protection. Branch circuit protection must be provided in accordance with the requirements of the National Electrical Code (NEC) and any local additional regulations.

Selection of branch protection for 400/500V units (excerpt)

The following is an example of protection configuration for a typical model:

MOVIDRIVE model non semiconductor fuse (maximum) inverse time circuit breaker Type E combination controller (ABB) Type E combination controller (Rockwell)

0005 (Size 0S) 15 A / 600 V 25 A max / 500 V MS132-2.5 (480V, 1 HP) 140M-C2E-B25 (460V, 1.5 HP)

0015 (Size 1) 35 A / 600 V 25 A max / 500 V MS132-6.3 (480V, 3 HP) 140M-C2E-B63 (460V, 5 HP)

0110 (Size 2) 110 A / 600 V — MS132-32 (480V, 20 HP) 140M-F8E-C32 (460V, 25 HP)

0150 (Size 3) 175 A / 600 V 90 A max / 500 V MS450-40E (480V, 30 HP) 140M-F8E-C45 (460V, 30 HP)

0370 (Size 4) 350 A / 600 V 175 A max / 500 V MS495-90E (480V, 75 HP) —

0750 (Size 5) 500 A / 600 V 175 A max / 500 V — —

1600 (Size 7) 400 A / 600 V 300 A max / 500 V — —

2500 (Size 7) 600 A / 600 V 600 A max / 500 V — —

Special attention: When using Type E combination motor controllers such as MS132-12, -16, -20, -25, -32, etc., ABB's S803W-SCLxxx-SR current limiter must be used, otherwise the SCCR rating will be reduced to 30kA/480Vrms.

230V unit branch protection (optional)

MOVIDRIVE model non semiconductor fuse (maximum) inverse time circuit breaker Type E combination controller (ABB)

0015 (Size 1) 30 A / 250 V 25 A max / 240 V MS132-10 (480V, 5 HP)

0037 (Size 1) 30 A / 250 V 25 A max / 240 V MS132-20 (480V, 10 HP)

0075 (Size 2) 110 A / 250 V 40 A max / 240 V MS450-40E (480V, 30 HP)

0150 (Size 3) 225 A / 250 V 90 A max / 240 V MS495-63E (480V, 50 HP)

0300 (Size 4) 350 A / 250 V 175 A max / 240 V —

1.4 Motor overload protection

The MDX60B/61B series frequency converter is equipped with overload protection function that is sensitive to load and speed, and has thermal memory retention function in case of shutdown or power failure. Adjust the trip current to 150% of the rated current of the motor.

1.5 Environmental temperature and derating

The frequency converter is suitable for ambient temperatures up to 40 ° C. If it exceeds 40 ° C, it needs to be downgraded for use, with a maximum allowable temperature of 60 ° C. The derating rules are as follows:

Between 40 ° C and 50 ° C: For every 1 ° C increase, the output current decreases by 2.5%

Between 50 ° C and 60 ° C: For every 1 ° C increase, the output current decreases by 3.0%

1.6 External 24V power supply and IT system limitations

The external DC 24V power supply must use units with tested limited output voltage (Umax=DC 30V) and limited output current (Imax=8A).

UL certification does not apply to power supply systems with ungrounded star points (IT systems).

1.7 Precautions for Brake Wiring

The data manual emphasizes the wiring safety of the brake:

In elevator applications, drives that require rapid braking response, and CFC and SERVO operating modes, the brakes must be simultaneously cut off on both the DC and AC sides.

If the brake rectifier is installed in the control cabinet, the connecting cable between the brake rectifier and the brake must be laid separately from other power cables. If it is necessary to share the same slot, the power cable must be shielded.

The connection of the brake must follow the wiring sequence, as incorrect connections can cause irreversible damage to the brake.

Units with sizes 1, 2, and 2S do not have PE connection points next to the power terminal and motor terminal. In this case, a DC bus should be used to connect the PE terminal next to (X4).

1.8 Braking resistor protection

Braking resistor (BW series) requires overload protection:

BW... - Model: Must be equipped with either an internal temperature switch or an external bimetallic relay (F16).

BW... -003/BW... -005: Adequate protection is already available, and external bimetallic relays can also be used as an additional option.

When the temperature switch or bimetallic relay is triggered, the main contactor K11 must be disconnected and a "0" signal must be given to DI00 (controller disable). It is strictly prohibited to interrupt the resistance circuit.

1.9 Size 7 DC Power Supply Unit

For size 7 units, the technical parameters of the DC power supply unit are:

Rated current: AC 2.4 A

Surge current: AC 30 A (380-500V input)

Attention: When using the backup power mode through the power unit, it is not allowed to connect an external+24V power supply to the X10:9 control terminal, otherwise an error message will be triggered.

MOVIDRIVE ®  MDR60A/61B and MDX62B UL requirements

The MDR series is a regenerative power unit used to feed back DC bus energy to the grid or as a braking module.

2.1 On site wiring power terminals

MDR60A0150-0750 and MDR61B1600-2500: Use only 60/75 ° C copper wires

MDX62B1600-2500: Use only 75 ° C copper wire

Terminal torque requirements:

Size in lbs Nm

2 16 1.8

3 31 3.5

4 120 14

7 207 20

2.2 Rated short-circuit current

MDR60A0150-0750 and MDR61B1600-2500: When these regenerative power units are installed together with the corresponding MOVIDRIVE inverters, the system can mark the short-circuit rating of the inverters. The maximum voltage is 500V.

MDX62B1600-2500: also suitable for circuits with 200000A or 65000A (with Type E combination controller).

2.3 Branch Circuit Protection

MDR60A/61B

Model Fuse Circuit Breaker Type E (ABB)

MDR60A0150 50 A / 600 V — MS450-50E (480V, 40 HP)

MDR60A0370 100 A / 600 V — MS495-75E (480V, 60 HP)

MDR60A0750 175 A / 600 V 175 A max / 500 V —

MDR61B1600 400 A / 600 V 600 A max / 500 V —

MDR61B2500 600 A / 600 V 600 A max / 500 V —

MDX62B

Model: Fuse Circuit Breaker

1600 (Size 7) 400 A / 600 V 600 A max / 500 V

2000 (Size 7) 500 A / 600 V 600 A max / 500 V

2500 (Size 7) 600 A / 600 V 600 A max / 500 V

2.4 Overload Protection and Environmental Temperature

MDX62B1600-2500 also provides overload protection of 150% of the rated current of the motor.

The derating of MDR60A0150-0750: between 40 ° C and 60 ° C, the derating decreases by 3.0% for every 1 ° C increase.

The derating of MDR61B1600-2500 and MDX62B1600-2500 is 2.5%/° C between 40-50 ° C and 3.0%/° C between 50-60 ° C.

2.5 DC bus connection

The data manual provides three schematic diagrams of DC bus connections:

Connect to MDR60A0150/0370/0750 regenerative power supply unit

MDR60A0150 is used as a brake module connection

MDR61B1600/2500 connected to MOVIDRIVE MDX61B/62B size 7 units

These wiring diagrams emphasize the correct connection method of the DC busbar and the reliable grounding of the protective conductor (PE).

MOVIDRIVE ®  Compact UL requirements

MOVIDRIVE ®  The compact series is a compact frequency converter with high integration, suitable for applications with limited space.

3.1 On site wiring power terminals

Postfix 0015 to 0300 models: Only use 60/75 ° C copper wire

Suffix 0370 to 0750 models: Only use 75 ° C copper wire

Torque requirements are related to size:

Frame size in lbs Nm

1 5 0.6

2 13 1.5

3 31 3.5

4, 5 120 14

3.2 Short circuit current rating and branch protection

This series is suitable for circuits with 200000 rms symmetrical amperes, with a maximum voltage limit of 500V (400V unit) or 240V (230V unit). The rated values of branch circuit protection fuses are as follows:

400/500V unit

Maximum model fuse

0015-0040 35 A / 600 V

0055-0110 110 A / 600 V

0150-0220 175 A / 600 V

0300 225 A / 600 V

0370-0450 350 A / 600 V

0550-0750 500 A / 600 V

230V unit

Maximum model fuse

0015-0037 30 A / 250 V

0055-0075 110 A / 250 V

0110 175 A / 250 V

0150 225 A / 250 V

0220-0300 350 A / 250 V

3.3 Motor Overload Protection

External motor over temperature detection is required (such as TF thermistor or TH temperature control switch).

3.4 Environmental temperature and derating

The same derating rules as MDX60B/61B: derating at 40-50 ° C by 2.5%/° C, derating at 50-60 ° C by 3.0%/° C.

3.5 Brake wiring

The wiring requirements for the compact series brake are consistent with the above:

Elevators and other applications must cut off the brakes on both DC and AC sides

The brake rectifier must use a separate power lead and is not allowed to draw power from the motor voltage

Sizes 1 and 2 require the use of PE terminals next to the DC bus

3.6 Braking resistor protection

The same protection requirements as MDX60B/61B: either the internal temperature switch or the external bimetallic relay must be selected. When triggered, K11 must be disconnected and the controller must be prohibited, and the resistance circuit must not be interrupted.

MOVIDRIVE ®  A UL requirement

MOVIDRIVE ®  The A series is an earlier version, but UL requires a high degree of consistency with the compact series.

4.1 On site wiring power terminals

Postfix 0015 to 0300:60/75 ° C copper wire

Suffix 0370 to 0750:75 ° C copper wire

The torque gauge is identical to the compact.

4.2 Short circuit current rating and branch protection

Using the same fuse rating table as the Compact series (see the 400/500V and 230V tables above), the maximum short-circuit current is 200000 A.

4.3 Motor Overload Protection

External motor overheating detection is also required.

4.4 Environmental temperature and derating

The rules are consistent with the Compact series.

4.5 Brake wiring

The data manual clearly states:

The brake rectifier requires a separate power lead and is not allowed to be powered by the motor voltage

Elevator applications, fast braking drive, and CFC/SERVO mode must cut off the brakes on both DC and AC sides

Sizes 1 and 2 require the use of PE terminals next to X4

The connection sequence of the brake must be correct, otherwise irreversible damage may occur

4.6 Braking resistor protection

Similar to the Compact series, the BW series brake resistor requires an internal temperature switch or an external bimetallic relay.

General Wiring and Safety Summary

Based on the data tables of the above series, the following core principles apply to all MOVIDRIVE ®  UL compliant installation of the product:

5.1 Temperature Class of Wires

Low power models (usually ≤ 30A input) can use 60/75 ° C copper wires

High power models must use 75 ° C copper wires

5.2 Terminal torque

Strictly select the torque according to the size. Tightness may damage the terminals, while looseness may cause excessive contact resistance and heat generation.

5.3 Branch Circuit Protection

UL certified fuses, circuit breakers, or Type E combination motor controllers must be used

For 400/500V units, the maximum fuse current varies from 35A to 600A

When using a Type E combination controller, attention should be paid to the coordination of the current limiter, otherwise the SCCR will decrease

5.4 Brake Safety

Double end cut-off brake is required for dangerous applications such as lifting

The brake rectifier requires an independent power supply

The wiring sequence of the brake is strict

5.5 Braking resistor protection

Must be equipped with an over temperature protection device (internal switch or external relay)

During the protective action, the main contactor must be disconnected and the controller must be prohibited

The resistance circuit must not be interrupted under any circumstances

5.6 Environmental and System Limitations

Maximum ambient temperature 40 ° C (without derating), maximum 60 ° C (for derating use)

The external 24V power supply must be limited to 30V/8A or less

UL certification is not applicable to IT systems (ungrounded star points)

5.7 PE grounding

Pay attention to using the PE terminal next to the DC bus for small-sized units such as size 1 and 2

All protective conductors must be reliably connected