Generator protection unit The main used for hydro generator capacity whose voltage is not more than 1000KW and the turbine generator capacity is not more than 3000KW of generator protection,it is a set of Practical generator protection unit that set the function of differential protection, grounding protection and generator protection in one ,The protection unit not only has complete protection function and accurate and reliable sampling, but also has 485 communication, Ethernet communication, optical fiber communication and other communication interface.It is the best choice for small capacity generating units！
If you need the protection of large capacity generator sets, we can choose our company's 9698 generator differential protection, 989 generator protection, 988 generator backup protection to form a complete generator protection.
function of 9688C generator protection unit:
differential time delay current instantaneous trip protection
Proportional differential protection
CT line break Locking ratio differential protection
delayed CT line break
Compound voltage lockout I, II over current protection
overload protection
Over voltage protection
voltage protection
Stator ground zero sequence over current
Stator ground zero sequence voltage
Frequency is too low
Frequency is too high
Non electricity protection－
Water / thermal accident－Tripping operation
Excitation accident trip
Electric accident trip
function of 9688C generator measurement and control protection unit:
Bus voltage：Uab、Ubc、Uca；Ua、Ub、Uc
Protection current：IA、IB、IC；Ia、Ib、Ic
measuring current ：Ia、Ic
power ：P、Q、cosФ
frequency ：f
Auxiliary function of 9688C generator protection unit:
Control circuit line break
manual switching on and off
remote control switching on and off
Fault recording
Communication mode of 9688C generator protection unit:
485 communication
Ethernet communication
Optical fiber communication
Technical parameters of 9688C generator protection unit
1）．unit rating：
alternating-current ： 5A or 1A
AC voltage： 100V or 100／V
working voltage： AC/DC 85V to 265V
Frequency： 50Hz
Wave form： sine,Waveform distortion is not greater than 2%
Ripple factor： Not more than 3%
2）．unit power consumption：
AC current loop：In＝5A Each phase is not more than 0.5VA, In＝1A Each phase is not more than 0.3VA
AC voltage loop: each phase is not more than 0.5VA
DC power circuit: the normal work, not more than 10W; protection action, not more than 30W.
3）．Measuring element precision：
error of graduation：Not more than ±1％
Temperature variation：In the working environment temperature range, not more than 2%
composite error ：Not greater than + 3%
measuring current ：0.2 grade
Bus voltage：0.2 grade
Frequency： 0.01HZ
P、Q、COSφ：0.5grade
Communication resolution：Not more than 1ms
Communication rate：300N(N =1/2/4/8/16/32/64) is adjustable
GPS time synchronization accuracy: less than 1ms
4） ．Environmental conditions for 9688C generator protection relay：
Normal operating temperature range：-30℃～＋60℃,Limiting operating temperature range：-40℃～＋70℃
storage temperature ：-40℃～+70℃
relative humidity：Not more than 95%, no condensation
Earthquake intensity：8
horizontal acceleration ：0.2g
Vertical acceleration：0.2g
atmospheric pressure：60Kpa ～ 110Kpa
Protection level：≥IP32 level
sea level：4000m
5） ．Protection, measuring range：
measuring current ：0.1In～1.2In；
Protection current：0.1In～20In；
zero-sequence current ：0.1In～20In
Voltage：0.1V～120V
Frequency：48.00～52.00Hz
6）．Setting range and error：
Current setting range：0.01In ～20In, error <±2%
Voltage setting range：0 ～120V error<±2%
Setting step：0.01In
Time setting range：0 ～100S, error <±2%
Setting step：0.01S
7）． contact rating ：
Tripping and closing coil outlet：0.5 to 5A adaptive
exit of tripping and switching on：DC220V 5A
Maximum relay outlet：10A
Signal exit：DC220V 5A
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