Voltage Relays Dealers in Bangalore

Focusing on the quality of the products, we are engaged in manufacturing, supplying, exporting and trading AC Voltage Relay. These are voltage monitoring and supervision relay for polyphase system that are extensively used for monitoring both under voltage and over voltage conditions. User-friendly in nature, these relays provide accurate reading for balanced and unbalanced load. Also, these relays are applicable For protection of synchronous & induction motors and transformer feeder panel. Features: User friendly setting Low power consumption Flawlessness Finish Details: Site selectable system voltage Continuous display of the measured voltage parameter 16 character 2 line LCD display with back-lit Accurate reading for balanced and unbalanced load Wide range of auxiliary input for both AC & DC Independent contacts for both Under & Over voltage Self reset & site selectable reset gap Built in fixed instantaneous Under & Over voltage highest trip User friendly setting modes using key pads Specifications: Parameter 3 Phase 4 Wire 3 Phase 3 Wire Aux voltage 85 to 275V ACDC 85 to 275V ACDC System voltage Un 220V230V240V250V AC site selectable 110V380V400V415V433V AC site selectable Over voltage setting range 101% to 120% in steps of 1% site Selectable 101% to 120% in steps of 1% site Selectable 0-30sec in steps of 0.1sec 0-30sec in steps o f 0.1sec Over voltage trip time 70% to 99% in steps 1% Site selectable 70% to 99% in steps 1% site Selectable Under voltage setting range 0-30sec in steps of 0.1sec 0-30 sec in steps o f 0.1sec 1% to 5% o f Un in steps of 1% 1% to 5% of Un in steps of 1% Under voltage trip time 0 -30sec in steps of 1sec 0 -30sec in steps o f 1sec Reset gap Fixed UV high set 120% of Un Fixed UV high set 120% of Un On time delay Independent contact for UVOV Independent con tact f or OVOV

MVT 181 is a numerical true RMS single pole relay consists of two elements. Each element can be selected for under voltage function or over voltage function or switched off. The characteristics setting, voltage setting and time multiplier setting are independently settable for each element and the voltage setting is in terms of voltage. Hence this relay can be used as a two stage under voltage or two stage over voltage protection. Multiple Characteristics:There are four operating characteristics for over voltage function and two operating characteristics for under voltage function. Overvoltage Characteristics:Definite Time Lag (DTL) Long Time Inverse (LTI) Extremely Inverse 1(El 1) Extremely Inverse 2(El 2) Undervoltage Characteristics:Definite Time Lag (DTL) Extremely Inverse 1(El 1) Two elements:Two stage O/V Two stage U/V Or one O/V and one U/V Timer:The relay is provided with two status inputs, one of which is to be connected across the circuit breaker auxiliary contact 52a. From this the circuit breaker closed or opened condition is found out. This information is used to introduce a time delay between successive switching of the capacitor banks which allows the capacitor bank to discharge to a safer value after disconnected from a live network. This timer function is a settable one and its output (N/O) contact is used in the closing circuit of the circuit breaker. The completion of this time delay is also indicated by ^TIMER^ LED in the front fascia. In addition the same status input can be used for Trip circuit supervision also. During other under voltage and over voltage applications this timer function can be disabled or used as an independent timer function. Trip Circuit Supervision:Pre-closing and post-closing supervision of the trip circuit and trip supply is possible with this relay. A low value of DC current is passed through the entire trip circuit to monitor the trip coil, its auxiliary switch and the associated wiring. One of the status input is connected across the tripping contact and another status input is connected across the 52a contact (auxiliary contact of the circuit breaker) in series with the trip coil. During trip circuit fail condition the monitoring current flow ceases and the energised status input drops off and the relay gives a contact output to indicate this condition. In addition to this contact an LED is provided in the front fascia to indicate the ^T.C. FAIL^ condition. A time delay of approximately 400 msecs has been given to avoid false trip circuit fail indication at the time of normal tripping. Thus trip circuit supervision is the integral part of the relay. If this function is not required the same can be put off in the setting menu.  

We are offering numerical unbalance voltage relay. Features software based design trips on neutral snap programmable active inhibit facility programmable rated voltages wide range of time delay setting.

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