Questions From You!

We had a problem with one of our DPR1000s. We changed the default password and forgot what the new password was. How can we reset the password on it?

Follow the below to see the current password. in the main menu

Step 1. => 8. SYSTEM INFO (ENT.)

Step 2. => 3. DIAGNOSIS (ENT.)

Step 3. DATA SPACE (▼ + ENT.)

Step 4. You can see the current password.

Step 5. ESC.

The rated current for GMC-9, AC-1 is 25A. If we want to connect a single phase (240V) load using this contactor, does it mean that each terminal can withstand 25A or 25 Amps in total? If it can withstand 25 A to each terminal, can I wire it like this (each phase connects to a single phase heater load, L1 = 18A, L2 = 20A, L3 = 18A)?

Each phase such as L1 = 18A, L2 = 20A, L3 = 18A is resistant to 25'Amps.

How can I communicate GIMAC – II Plus to I4XS4UE GIMAC – II Plus: RS845 5-Pins(COM, TX0, TX1, RX0, RX1) I4XS4UE: RS845 3-Pins(A, C, B)?

You can view it by downloading the manual file. Download link

I need TECHNICAL information for DMP relay. Where can we find the certificate for this product? Can we use the product if the motor is larger than 22kW?

You can get the certificate from the link. For your question, if you want to protect the motor more than its rated value, make high capacity CT + DMP06 series combinations.

Is it possible to mount in mini ms fixed position? In our catalog there is information that the mini conductor can be mounted 30 degrees on both sides, but it is possible to set up an angle of 90 degrees. What effect does it have on the contactor if it is mounted horizontally (90 degrees)?

You should not use the mini contactors vertically at 90 degrees. This reduces rated currents and reduces product lifetimes.

In the light of what standard should I decide on a thermal type overload relay?

Thermal overload relay is an equipment that detects abnormal current such as overcurrent to protect the load and must be adjusted in accordance with the actual load current.

What is the difference between thermal magnetic switch and fuse?

Fuses were used to protect against overload or short circuit before MCCBs were manufactured. Fuses serve the same purpose as MCCB, but their protection current and usage areas are limited. MCCBs are used at much higher loads and currents.

Can I use a 3 pole MCCB in a single phase system?
Yes. LS Electric UL489 MCCBs are suitable for use in single phase systems. LS Electric Susol UTE / UTS 3-pole MCCBs can be applied to single-phase systems provided the MCCB is properly sized per given load. Also, for load balancing, the MCCB must be similar to one of the diagrams below.
What is the allowable operating temperature range for LS Electric MCCBs?
Operating Temperature Range

between -5 and +70℃

* reduce if the temperature is not 40℃

There should be no dew/moisture freezing caused by a sudden temperature change.
Relative humidity
45 to 85%RH
Altitude below 2,000m
Installation EnvironmentNot suitable for environments containing dust, smoke, caustic gas, steam and salt.
Storage temperature-5 to +50℃
What are the working conditions of GMC contactors?

The using conditions of our GMC contactor are as follows: 1. Ambient temperature: -5 ℃ ~ 40 ℃ 2. Humidity: 45 ~ 85%. Altitude: places below 2,000 meters

If we buy 3 Pole ACB with OCR II and customer want to use Earth Fault Function, can we connect outside of Neutral Current Transformer to OCR II? Is there a CT Terminal? Do we have to use OCR II?

We are pleased to report that there is an earth fault function in the OCR II (type: LN5) and the 3-pole ACB. It has an NCT (+ and -) terminal. Thus, the user can easily connect Neutral CT to ACB. Please note that the secondary output current of the NCT should be 5A.

Can your MCCB Thermal magnetic switches be remotely controlled?

Remote start devices that can shut down the equipment need to turn off the MCCB using the motor or solenoid in the remote control. In the ON state, MCCBs will not be allowed to be used by SHT.

What is the difference between TM series and ODP series and which one is better to use?

TM and ODP are the trigger elements of the overcurrent. It is driven by TM bimetal and ODP wrapped in oil box. TM and ODP are different, that is, ODP needs to correct the rated current because the rated current is different according to the mounting angle.

What are the tripping current values of LSIS MCCBs?

The breaking current ratings of LSIS MCCBs are between 3A – 1200A. Classified by categories 30AF, 50AF, 100AF, 225AF, 400AF, 600AF, 800AF, 1000AF, 1200AF and classified by Amps/Chassis.

What is the IP Protection class for MCCB D-45S / D35S / D55S handle? If the customer needs IP 54, what should we do?

It has IP 54 protection class for D class handles. You can recommend it to your customer.

What are the auxiliary options for Metasol Contactors?
LS Electric offers a variety of auxiliary products that can be used with Metasol contactors. Customized auxiliary products are available for both side-mount and front-mount operations. You can find examples of these below.
Side Mount
  • UA-1 (1 Product)
Front Link
  • UA-2 (2 Products)
  • UA-4 (4 Products)
Auxiliaries are designated “A” for Normally Open and “B” for Normally Closed when ordering. It will be printed as NO and NC on the product.

Below you will find a list of possible combinations for ordering codes and NO and NC arrangements.

What are the differences between the available MC Contactors?

Metasol MC contactors have 2 different options for surge protection. Selecting the option with Varistor and varistor + RC Varistor will ensure that the peak voltage is lowered during a surge. Alternatively, the Varistor + RC option also has the ability to reduce the peak voltage, PLUS it will cut off the high frequency wave from the surge voltage. You can see the differences in the image below.

Do LS Electric Metasol contactors meet NEMA standards?

Yes, they are tested according to the NEMA Standard (Addendum to Part 2 of ICS2-2000 Page 5 / Errata). See the reference chart below for NEMA sizes.v

What is the auxiliary part number for use with a 4 pole contactor?

The 4-pole (4P) contactor design is slightly different from the 3-pole ones. Therefore, there is a different auxiliary used. The AU-1 assistant can be ordered for 4P contactors. It is used with the item code below.

What does "spare" mean in the coil part number designation?

The large number of coils used for LS Electric contactors can be a bit confusing when searching. The difference between the “spare” coil and the non-spare leads to this confusion. See the example below. The difference is actually quite simple. The “spare” coil is packaged in a box, while the non-spare coil comes loose. The electrically powered coils are replaceable and both can be ordered.

Which EMPRs have an auto-reset feature?

GMP series EMPRs marked “A” have an automatic reset function. Refer to the model #s list below with auto reset.

Item CodeModel
3802009500GMP22-2PA 1.5A  110/220V 1a1b (Sol) EXP
3802009600GMP22-2PA 5A 110/220V 1a1b (Sol) EXP
3802009700GMP22-2PA 22A 110/220V 1a1b (Sol) EXP
3804005700GMP40-2PA 20A  110/220V 1a1b (Sol) EXP
3804005800GMP40-2PA 40A 110/220V 1a1b (sol) EXP
3806011700GMP60-TA 6A  110V 1c[R] EXP
3806011800GMP60-TA 30A  110V 1c[R] EXP
3806011900GMP60-TA 60A  110V 1c[R] EXP
3806012000GMP60-TA 6A  220V 1c[R] EXP
3806012100GMP60-TA 30A  220V 1c[R] EXP
3806012200GMP60-TA 60A  220V 1c[R] EXP
3806016900GMP60-TA 6A  110V 1c[N] EXP
3806017000GMP60-TA 30A  110V 1c[N] EXP
3806017100GMP60-TA 60A  110V 1c[N] EXP
3806017200GMP60-TA 6A  220V 1c[N] EXP
3806017300GMP60-TA 30A  220V 1c[N] EXP
3806017400GMP60-TA 60A  220V 1c[N] EXP
GMP22 / 40-2PA (auto-reset) specifications
1) Auto reset time: auto reset within 1 minute
2) Automatic reset operation: Automatic reset only during overcurrent operation
-Auto reset is performed within 60 seconds only in overcurrent operation
-No auto reset within 60 seconds during open phase state
GMP60TA (auto-reset) features
1) Protection element: overcurrent Overcurrent Characteristics: trip in 5 seconds when over 105%
– The O-time command dial is used to set the auto reset time (0, 20, 40, 80, 120 seconds): O-time is always fixed at 5 seconds
-Auto reset is done at the set auto reset time in case of overcurrent
2) Working Time -Overcurrent operation delay (D-TIME) time: same as GMP60T
- Overcurrent working time: within 5 seconds
- Auto reset time: 0~120 seconds (current O-TIME BUTTON is changed to A-TIME BUTTON) Current O-TIME is fixed in 5 seconds
How many accessories can be fitted to an MCB?

LS Electric Miniature Circuit Breaker (MCB) accessories are always mounted on the left. This is because of the mechanical release pin in the MCB. There are various accessories that can be mounted on MCBs. See the combinations below for reference. Up to 4 accessories can be mounted.

Are compact type and regular rotary shafts the same?

No. There are two types of rotary shafts for MCCBs offered by LS Electric. They are of EHU and REH type. The EHU and REH shafts are different and NOT REPLACED.


What does "LWT" mean for auxiliary contacts?

There are two types of cable/terminal for MCCB auxiliary contacts. See pictures and description below.

LWT: lead wire type

TBT : terminal block type

Can I reverse feed LS Electric circuit breakers?
LS Electric MCCBs are not divided into “line” and “load”. Therefore, circuit breakers can be reverse fed according to UL489. Please note that local codes should always be checked to allow reverse feeding.
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