Voltage Detecting Protecting Relay
Application
1. Phase Failure
2. Phase Sequence
3. Over / Under Voltage
Features
1. For preventing from three phase Inductive Motors reverses, it’s included additional power
surging protection within 440V and to protect the overloading situation.
2. Phase failure protection: When Power is fail, the loading is stop.
3. Phase Sequence protection: When measuring the sequence of three phase, the power is stop
to prevent motors from reversing.
4. This series is for detecting and protecting the power status. When the power is applied
un-normally, the protect relay automatically stops the power as well as to protect the electric
circuits in the system.
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Panel Function
1
1
3
2
2 5
3 4
MARKS MARKS
1 Action indication 1 Action indication
2 Diagram 2 Model No.
3 Model No. 3 Over set knob
4 Under set knob
5 Diagram
1
1
2
5
2 3
3 4
MARKS MARKS
1 Model No. 1 Model no.
2 Diagram 2 Over set knob
3 Action indication 3 Under set knob
4 Action indication
5 Diagram
Copyright 2011-2012 © MAXTHERMO-GITTA GROUP CORPORATION
Standard Specification
Model JVM-1 JVM-2 JVM-3 JVM-4
Appearance
Phase Failure Phase Failure
Phase Failure Phase Sequence Phase Failure Phase Sequence
Features
Phase Sequence Over Voltage Phase Sequence Over Voltage
Under Voltage Under Voltage
Surface Socket base Socket base Socket base Socket base
Mounting 8PFA 8PFA P2CF11 P2CF11
Output Capacity SPDT 7A / 250VAC
Delay on：0.5 Sec
Response time
Delay off：3 Sec
Frequency 50Hz or 60Hz (Depend upon user’s area)
3Ø：220，380， 3Ø：220，380，
3Ø 410，440 3Ø 410，440
Rated Voltage
220，380，410， 1Ø：110，220， 220，380，410， 1Ø：110，220，
(Range :80~110%)
440 380，410， 440 380，410，
440 440
Mechanically 10,000,000 Times
Life Electrically
500,000 Times
AC220V PF=1
Repeat - ±2% Max - ±2% Max
Setting - ±10% Max - ±10% Max
Accuracy
Voltage - ±2% Max - ±2% Max
Temperature - ±2% Max - ±2% Max
Reset Time 0.2 Sec Max
Ambient Temp -10℃ ~ +55℃
Ambient Humidity 85% Max RH
Copyright 2011-2012 © MAXTHERMO-GITTA GROUP CORPORATION
Connection & Operational Diagrams
Type：JVM-1＆JVM-3
A. Wiring diagram
B. Phase Failure C. Phase Sequence D. Timing
E. Explanation:
1. Output relay will be switched to ON (pin#1 & pin#3 close) immediately when power is applied to the unit with
correct phase sequence and voltages.
2. In case of any phase failure or voltage drops below 70% of the rated voltage which lasts for 3 seconds , then the
output relay will return to its original position ( pin#1 & pin#4 close) to cut power until 3 phase voltages and phase
sequence are correct.
Copyright 2011-2012 © MAXTHERMO-GITTA GROUP CORPORATION
Type：JVM-2＆JVM-4
A. Wiring diagram
1. Single phase
2. Three phase
B. Phase Failure C. Phase Sequence D. Timing
E. Explanation:
1. Output relay will operate to ON (pin#1 & pun#3 close) when power is applied to the unit normally, and
simultaneously detect if supplied power voltages (single or three phase) are within the set voltage range , and
phases in correct sequence for three phase type.
2. 0% to 20% knob-adjustable separately for over voltage and under voltage. If voltage is over under than the
setting voltage for over 3 second, then the output relay will be released to its original position (pin#1 & pin#4
close).
Copyright 2011-2012 © MAXTHERMO-GITTA GROUP CORPORATION
Socket Base
8PFA
P2CF11
Copyright 2011-2012 © MAXTHERMO-GITTA GROUP CORPORATION
Contact
Add: 3C22-23 & 3C25-26, Taipei World Trade Center, No. 5, Sec. 5, Hsin Yi Rd. Taipei Taiwan, R.O.C.
Tel: 886-2-27206601 (Rep.)
Fax: 886-2-23455120
E-mail: gitta@ms9.hinet.net
http://www.maxthermo.com
Add: 11F., No.168, Jiankang Rd., Zhonghe Dist., New Taipei City 235, Taiwan (R.O.C.)
Tel: 886-2-22287950 (Rep.)
Fax: 886-2-22286140
Add: 86/132-133 m.7 Samaedum Bangkoontien Bangkok 10150 Thailand.
Tel: +662-415-8318 , +662-417-2548-49
Fax: +662-415-8798
http://www.thaimaximum.com
Copyright 2011-2012 © MAXTHERMO-GITTA GROUP CORPORATION
