Tag Archives: meiji switch

Meiji Transfer SwitchesUnlike the conventional “Double Throw Switch”, ‘Meiji’ MTS is a compact, light-weight and very user-friendly Manual Transfer Switch with a built-in interlocking system that mechanically interlocks the Normal (MERALCO) from the Emergency lines (GENSET). Turning on the Normal side breaker will automatically switch off the Emergency side. On the other hand, the Normal side will have to be switched off first before the Emergency side can be switched on.

Bus Bar

Application

Busbar of pin and fork type ensures reliable and efficient terminal connection to MCB, RCCB and other modular electric devices.

Construction and Feature

  • Standard segmented connecting pin saves labor tremendously
  • High purified copper used to ensure perfect electricity conductivity
  • Fire resistant material endures abnormal heating Technical Data
Meiji Transfer Switches
MTS-open

MTS-Transfer Switches

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CONTACTOR Transfer SwitchGeneral Features

The Meiji Contractor-Type Transfer Switch (CTS) with EMPR gives you the convenience of using the same feeder lines for the load side during emergency power (generator), with a current-limiting device, the EMPR, that can give the user flexibility in adjusting the amount of power to be given each load, during power failures.

Operation

During normal power after a pre-set delayed time, the ‘MAIN’ contractor (please refer to the diagram) is energized, closing the circuit from the line side (MERALCO) to the load side (home, office, condo, unit, etc.). During this time, the electrical and mechanical interlocks of this 2-contractor system ‘locks-out’ and prevent the ‘GENSET’ contractor from energizing or closing.

Line wiring for single phaseDuring power outage (brownout), the ‘MAIN’ contractor is of course de-energized (opened), releasing the interlocks on the system. With the generator power on, after a pre-set delayed time, the ‘GENSET’ contractor will thus be energized and closes the circuit from the line side (generator), through the EMPR, to the load side. This time, the same interlocking system ‘locks out’ and prevents the ‘MAIN’ contractor from energizing or closing. A load user will be allowed to use the emergency power up to the pre-set limit of the EMPR.

Any overload will cause the EMPR to ‘trip’, thus cutting off any emergency power to that load. Depending on the size and setting of the EMPR, an overload can cause the emergency power to be cut-off from the load, in as short as 4 seconds. (Please refer to specifications on EMPR). Upon reduction of the said overload to the acceptable pre-set limit, emergency power may be restored back automatically to the said load.

When the normal power comes back, the ‘GENSET’ contractor is automatically de-energized, thus cutting-off the supply from the ‘GENSET’ to the load side, and releasing the mechanical and electrical interlocks of the system. At this point, the ‘GENSET’ is running at no-load and can be safely turned-off. After a pre-set delated time, the main contractor will be energized again, and normal power is then restored back.

Electronic Motor Protection Rleays – EMPR

The electronic motor protection relay, as named EMPR, protects electric equipments such as three-phase motors against overheating under normal and heavy starting conditions. The overheating can be caused by overloading, single-phasing or current unbalance etc.

Extensive current range

EMPR is available with continuous setting ranges for motor current between 0.2A and 90A. The current adjustable range is 5 times to 10 times.

CONTACTOR AUXILLIARIESAmbient temperature

This device makes a good performance in -25 degree C to 60 degree C in operation and in -50 degree C to 80 degree C in storage.

Humidity

This device should be used in 10% RH to 90RH, and it’s recommended to be used in 60% RH.

Isolated Auxillary Contacts

EMPR has the isolated auxillary contacts, 1NO + 1NC

Test / Reset Button

The tripping function of the EMPR can be tested using the TEST/RESET button. EMPR can be activated by holding down this button.

Visible Indicator

The O.L. (Overload) LED and the fault trip LED indicate the trip situation caused by overload, phase loss and phase unbalance respectively.

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