1.Application
The rated insulation voltage of series residual current operated circuit breaker is 1000V,which is suitable for three-phase four-wire
neutral point direct grounding (TT)distribution networks with 50Hz AC,400V rated
voltage and 630A rated current.It is used to provide indirect contact protection;Prevent fire danger caused by grounding fault current
due to equipment insulation damage;And it can be used to distribute electric
energy and it can also be used to distribute electric energy and protect lines and power supply equipment from overload ,short
circuit,overvoltage,undervoltage single-phase grounding fault and other faults.
Products meet the following standards:Low-voltage Switchgear and Control Gear-Part 2:Circuit Breaker (IEC60947-2);
2.Main Functions and Features
1.High-performance 32-bit ARM microprocessor is used to carry out signal processing and intelligent control in real
time;
2.LCD Chinese/English display provides friendly HMl and simple operation;
3.For residual current (leakage)protection,the residual current gear can be set online,with reclosing function; Monitor and track the
residual current of the line in realtime,and automatically adjust the gear to ensure the operation rate and reliability of the product;
4.Long delay,short delay and instantaneous three-stage protection,electronic tripping mode is applied,which s independent of supply
voltage;
5.High breaking ability could ensure the reliability of short circuit protection for the line;
6.Overvoltage protection,undervoltage protection,phase loss protection;
7. Real-time display of residual current,three-phase supply voltage and load current of the line;
8.Protection functions and parameters can be set and modified online;
9.Trip types (residual current,locking,overload,undervoltage,overvoltage,phase loss)can be identified & displayed,and can be
stored,inquired &deleted;
10.Network type has communication function,which can realize remote communication,remote telemetry,remote control and
remote adjustment.
11.Pluggable lightning protection module (optional)
12.Infrared communication function (optional)
3.Main Technical Parameters
4.Description of Protection features
4.1 Overload long delay protection
4.2 Short-circuit short-time delay protection
4.3 Instantaneous protection
4.4 Residual current protection features
4.5 Automatic reclosing
When the residual current exceeds the operating current value,the gear can automatically reclose after 20~ 60s,but the manual
closing is not limited by time.If the fault current is eliminated within 5s after closing,the closing is successful and the circuit breaker
runs normally;If the fault current is not eliminated,the circuit breaker trips again and is locked,so it cannot be reclosed automatically,but
must be closed manually.
4.6 Overvoltage protection function
When the line phase voltage is higher than the set value of overvoltage protection,the circuit breaker protection trips.When the line
voltage returns to normal,the circuit breaker can be automatically closed for operation.The setting value range of overvoltage protection
is 231V~330V,and the factory setting is 275V. Users can set or close the protection.
4.7 Undervoltage protection function
When the line phase voltage is lower than the set value of undervoltage protection,the circuit breaker protection trips.When the line
voltage returns to normal,the circuit breaker can be automatically closed for operation.
The setting value range of undervoltage protection is 88V~209V,and the factory setting is 145V.Users can set or close the protection.
4.8 Phase loss protection function
When the power supply terminal of the line is of phase loss,the circuit breaker protection trips.
When the line voltage returns to normal,the circuit breaker can be automatically closed for operation.
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