PARALLELISM CONTROLLER MFC-300P MODEL

The Parallelism Controller was developed by Licht for the parallelism supervision and control of 3-phase power transformers and 3-phase groups of single-phase transformers. The controller features 10 relays for electromechanics logic, RS485 interface for supervision and control and one optional current output for position retransmission.

Indicate the desired reference:

ADDITIONAL INFORMATION:

The device is implemented according to the Master - Follower principle, under which all the OLTC’s positions are kept synchronized. For parallel control to be successful under this scenario, we admit that all involved transformers have identical nominal currents, number of taps and voltage delta per tap. The position of each OLTC is read directly from its potentiometric sensor or indirectly through a current circuit (normally 4-20 mA), or even BCD signals (8421) representing the tap changer position.

Upon receiving a signal from the Voltage Regulator Relay, the Parallelism Controller simultaneously commands all OLTC’s so that tap changes are made at the same time on all transformers in parallel. During parallel control, the Master tap changer’s position is compared to its Followers’, and tap changer pulses are issued to the Follower tap changers whose positions don’t match their Master’s.

Power supply: 80-265 Vdc/Vac

Full galvanic isolation

Available formats: 96 x 48 mm, and 96 x 96 mm

Panel assembly or assembly 35 mm DIN rail (Mod. MFC-202)

10 Relays (raise and lower tap, manual, master, follower, individual, errors)

01 Position readout input (potentiometric disc, BCD and DC current input)

Digital inputs (manual, master, follower, individual)

02 RS485 Modbus interface (1 port for supervisory system and 1 port for bus intercom)

TCP-IP (MFC-500)

USB (MFC-500)

Windows software for remote access, allows configuration and total control of the equipment (MFC-500)