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1, Chandney Chawk Street, Kolkata-700072
9830059416
033 2215 2351 / 4004 6507
heraldcorpn@gmail.com
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1, Chandni Chawk Street, Kolkata-700072
LEADING PROVIDER
OF INDUSTRIAL SOLUTIONS
PRODUCT BEST RATE
NO. 1 EASTERN INDIA
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LEADING PROVIDER
OF INDUSTRIAL SOLUTIONS
PRODUCT BEST RATE
NO. 1 EASTERN INDIA
Toggle navigation
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Electronic Automation
Timer
Preset Production Counter
Time Switch
Tacho Meter
Energy Management System
Monitoring & Motor Protection Devices
Annunciator
Power Supply Module
Temperature Controller
C & S Electric
Low Voltage Products And Solutions
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Relay
Medium Voltage Products
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Overfrequency Relay : BF1-O
Overfrequency Relay : BF1-O
RANGE
Rated voltage Un : 110 V, 230 V, 400 V AC
frequency range at
50 Hz rated frequency : 50 – 54 Hz
60 Hz rated frequency : 60 – 64.8 Hz
Tolerance : ± 1 % of of rated frequency
Hysteresis : 0.5 % of of rated frequency
power consumption : 3.7 VA
Thermal load carrying : continuously 1.3 x Un capacity
Returning time : 250 ms
Minimum operating time : 250 ms