MPC3000

A comprehensive motor protection relay used for large LV and medium voltage 3-phase motor protection and control via multiple starting logic options

Thermal overload, earth fault, negative phase sequence, under and over voltage, phase loss, phase rotation, 5 channel over-temp protection via thermistors or RTDs

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200(w)x150mm(h) withdrawable case construction with self-shorting CT contacts, M4 screw terminals and IP54 rated perspex cover

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50x50mm Graphical LCD with start curve capture
9x LEDs
17x Digital inputs
4x Changeover contact relay outputs
5x RTC/PTC/NTC 3 wire inputs
4x CT inputs 1A or 5A (3ph + 1EF)
3x VT Inputs 100-500V ac nominal

Aux supply 80-265V ac/dc or low voltage 24-70V ac/dc
RS485 Modbus
Mini USB front port

MicroMotor

MicroMotor (uMotor) is suitable for a variety of motor starting configurations and was designed as the smallest of our intelligent devices to provide protection and control for high density, multi-tier motor control centre (MCC) projects.

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The relay allows connection via a remote interposing current transformer (CT) module to either conventional 1A or 5A secondary rated CTs, or for direct motor lead connection via, 1A, 2A, 5A, 10A and 15A rated interposing CTs to motors of upto 11Kw (415V).

The MicroMotor relay is housed within a 96x96mm flush panel-mounting DIN case with a separate din rail mounting CT module connected via a 300mm cable.

The MicroMotor can be equipped with one of several communication protocols, Modbus RS485, Profibus DP, Modbus over Ethernet

uMotor with Modbus over ethernet RJ45

uMotor with Profibus & 9-way D type conn

uMotor with P&B Standard/Modbus with simple 3 pin conn

2×16 line LCD
5x Digital inputs
3x Changeover contact relay outputs
1x VT Input 100-500V ac nominal (Ph-N or Ph-Ph connection)

Aux supply 80-265V ac/dc or low voltage 24-70V ac/dc
RS485 Modbus or Profibus or Ethernet TCP/IP port
Mini USB front port

optional
1x RTC/PTC/NTC 3 wire input

Separately mounted
4x CT inputs 1A or 5A (3ph + 1EF)

DIN rail mounted uMotor

The uMotor can be supplied in a package allowing the device to be DIN rail mountable to standard 35mm tophat din rail. The normal connections for power, Vref, DI/DO’s are then made at 90 degrees to the rear of the relay.

The CT connection is rated at 25mA and is designed to 5p10 at the following ratings:

10A:0.025A (10A:25mA) for motors with an expected full load current of between 2.5A to 15A

50A:0.025A (50A:25mA) for motors with an expected full load current of between 12.5A to 75A

100A:0.025A (100A:25mA) for motors with an expected full load current of between 25A to 150A

The 25mA output has some advantages in that it is still a measurement based upon a current loop and yet the normal amount of iron within the CT core for typical 5A or 1A secondary outputs, (particularly at low primary/energising currents) is not needed and therefore the physical size of a low primary CT remains very small.

If necessary the phase CTs can be double wound with the primary conductor (providing the CT aperture space permits this) in order to reduce the In rating to half.

So, a 10A:0.025mA can be suitably used as a 5A:25mA CT with two passes of the primary conductor.

Vision 3000

Front View of the Vision 3000 with left hand bank of LEDs

Rear view of the Vision3000 connections

A comprehensive and extensively used relay used for large LV and medium voltage 3-phase motor protection, developed primarily as a direct replacement for the older MPR2000.

Thermal overload, earth fault, negative phase sequence, under and over voltage, phase loss, phase rotation, 5 channel over-temp protection via thermistors or RTDs.

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