Voltage Relay

Features

• Adjustable On/Off-Time delays provided.
• Common setting for all the phases.
• Factory set On/Off Voltage differential (Back-lash)
• Unaffected by frequency variations.
• Positive action without chattering.
• Both Din rail & Screw mounting provided.
• Life time guarantee of the unit (conditions apply)

Description

This is a compact micro-electronic device based on latest technology. It senses the voltage supply at its terminals and operates electromagnetic relay in case of over voltage condition. Thie relay gets energised/ON for over voltage condition in any of phases. Over voltage setting and On/Off Time delays are continuously adjustable with the help of a knob over linear caliberated dial. Separate terminals for Auxillary voltage / operating voltage are provided in case of 3 three phase models. Two change over contacts are provided for customer's usage. Three LED's (Light Emitting Diodes) are provided on top of the unit to indicate 'Voltage Supply On', Relay ON' and Over Voltage Condition'.


Standard Models

Three Phase With Neutral-3pn
Voltage Setting 240-280 : (Backlash 5 VAC)
ON/OFF Time Delay : 1 - 15 Seconds


Three Phase Without Neutral-3p
Over Voltage Setting : 400-500 VAC (Backlash -7 VAC)
Auxillary / Operating Supply : 415 VAC
ON/OFF Time Delay : 1-15 Seconds


Two Phase-2p
Voltage Setting 400-500 : (Backlash 7 VAC)
ON/OFF Time Delay : 1 - 15 Seconds

One Phase –1p
Over Voltage Setting 240-250 VAC (Backlash - 5 VAC)
ON/OFF Time Delay : 1 - 15 Second


Setting / Repeat Accuracy
± 2% of the time and voltage setting.


Maximum Permissible Operating Voltage

• 550 VAC for three / two phase system.
• 300 VAC for one phase system.

Burden
10VA (maximum)


Insulation
The unit will withstand 2.5 KV 50 HZ for one minute between all A.C. Supply terminals and relay connected together and body.


Relay Contact Rating
6 Amps resistive load or 2 Amps inductive load at 230 VAC/440 VAC or 24 VDC


Dimension
Height 128mm, Base 70 mm x 102 mm

This relay is designed using micro-controller technology. It is
very simple to use and at the same time very accurate and
reliable. It is guaranteed for the performance as per design
for the lifetime of the components, best available in market.
Application :-
This relay is used for controlling the D.C. supply for under
voltage condition. The relay gets de-energised when the
supply voltage goes below the setting. Two changeover
contacts are provided for customer usage for indication and
protection.
Characteristics and features :-
Ÿ Micro-controller based design.
Ÿ Voltage monitoring for under voltage condition.
Ÿ Wide setting range through a knob over linearly calibrated
dial.
Ÿ Independently adjustable ON and OFF delay timers for
reliable operation.
Ÿ ON/OFF differential is adjustable for accommodating
supply voltage change due to loading and unloading.
Packaging :-
Corrugated card box with bubble packing
Working Principle :-
Two different supply input are provided for accurate setting of
the relay in the factory during testing and setting at the final
stage of production. One +ve supply is for operation of the
relay which changes due to energisation and de-energisation
of the electromagnetic relay used for outputs contacts. Second
+ve supply is for sensing the voltage supply which is provided
through a variable source for doing testing and setting of the
unit at the final stage of production in the factory.
During actual operation both the +ve supply inputs are
shorted as we use same supply for operation and sensing. The
relay has a stabilized reference voltage adjustable through
the under voltage setting potentiometer knob which is
compared with the supply voltage and accordingly the output
electromagnetic relay is energised / de-energised through
independently adjustable ON and OFF delay timers. The
reference voltage is further adjusted depending on the
ON/OFF state of the output relay according to the ON/OFF
differential setting to accommodate change in the supply
voltage due to loading / unloading
LED''s :-
5 LED''s are provided or on the top of the unit with the details on the label.
Reset :-
This unit is auto reset. When the correct voltage is restored the relay gets energised
Setting Ranges :-
Voltage setting : 70 – 110 VDC
Differential Voltage Setting : 5 – 15 VDC
ON and OFF Delay Timers : 0 – 15 Secs
Technical Data :-
Operating Voltage : 50 – 150 VDS
Operation Time : As per the time set on the unit
with minimum of 50 msec.
Output Relay : It is rated for 5 Amps A.C.
current at 240V AC or
1.5 Amp D.C. Current at 24 VDC
System Data :-
Storage Temperature Range : -400C to +850C
Operating Temperature Range : -200C to +700C
Insulation Test Voltage as per : 2.5 kV (eff.), 50 Hz, 1 min
EN60255-6 & IIEC255-5
Impulse Test Voltage as per IS 8686 : 5.0 kV, 1.2/50 us, 0.5J
High Frequency Interference : 2.5 KV/1 MHZ
Test Voltage as per IS 8686
Weight : 500 grms
Dimensions :- Height - 129 mm, Base 90 mm x 102 mm
Mounting Details :-