The capacitor protection and control device is mainly used for 110KV, 66KV, 35KV, 20KV, 10KV, 6KV and other voltage levels of the majority of the system and all the places of cabinet；complete protection function of Product,And has a complete and powerful acquisition function of the voltage current analog and switching value of a device;And optional standard Ethernet, optical fiber, RS485, RS232, CAN and other communication interface or no communication port;you can choose whether with anti jump function freely，Avoid the collision between the microcomputer protection device and the switch;there are perfect capacitor protector product line,such as 9461 economic type capacitor protection measurement and control device, 9561 standard capacitor protection measurement and control device, 9676 high-end type capacitor protection measurement and control device, 964 capacitor automatic feeding and cutting device etc in our company. the capacitor protection has been applied to many fields of international and domestic, its unique price and quality has been recognized by the majority of users .
Capacitor protection device suitable for capacitor of 110KV, 66KV and below voltage, the device has many protective functions of instantaneous trip protection, over current, the unbalanced current (capacitor open-delta) and unbalanced voltage (capacitor open-delta), over voltage (trip operation), low voltage (trip operation), bus ground (alarm) ; and it integrates protection and telecontrol. It can not only focus on group panel, but also can be installed in the switchgear on the spot, comprehensive support for the comprehensive automatic distribution system.
he protective function of Capacitor protection device
Current instantaneous trip protection
Over current protection
Unbalanced current (capacitor open-delta)
Unbalanced voltage (capacitor open-delta)
Over voltage (trip operation),
Low voltage (trip operation),
Bus ground (alarm)
Measurement and control:
Busbar voltage : Uab、Ubc、Uca；Ua、Ub、Uc；
Measuring current : Ia、 Ib、 Ic、
Power: P Q cosФ
Frequency: f
Assistant functions:
Control the circuit break
Opening and closing of circuit breaker by hand
Opening and closing of circuit breaker by remote control
Fault recording
Communication mode
485 communication
Ethernet communication
Fiber-optic communication
Protection Principle:
Current instantaneous trip protection
1.RLP1 current instantaneous trip protection-“turn on”
2.Any phase current sampling value of protective current IA (IB) IC≧current instantaneous trip protection constant value (Idz0).
Protector action exit C7/C8, while driving the fault signaling relay C1/C3 (return after 10s). Panel emergency lamp lights.
Over current protection
1.RLP2 over current protection--“turn on”
2.Any phase current sampling value of protective current IA (IB) IC≧over current protection constant value（Idz2）
3.Collected current time from start to end ≧ over current delay
Protector action exit C7/C8, while driving the fault signaling relay C1/C3 (return after 10s). Panel emergency lamp lights.
Low voltage
1.RLP3 low voltage--“turn on”; switch is closed
2.Any of the two phase line voltage sampling value≦low voltage constant value（Udz1）
3.Low voltage sampling delay time≧ low voltage delay（tuzd1）
4.Protector action exit C7/C8, while driving the fault signaling relay C1/C3 (return after 10s). Panel emergency lamp lights.
Over voltage
1.RLP4 over voltage--“turn on”; switch is closed
2.Any of the two phase line voltage sampling value≧over voltage constant value（Udzh）
3.over voltage sampling delay time≧ over voltage delay（tuzd2）
4.Protector action exit C7/C8, while driving the fault signaling relay C1/C3 (return after 10s). Panel emergency lamp lights.
Unbalanced voltage
1.RLP5 unbalanced voltage--“turn on”;
2.unbalanced voltage(3Uo) sampling value≧ unbalanced voltage constant value（Updz）
3.unbalanced voltage duration time≧ over voltage delay（tupzd）
Protector action exit C7/C8, while driving the fault signaling relay C1/C3 (return after 10s). Panel emergency lamp lights.
Unbalanced current
1. RLP6 unbalanced current --“turn on”;
2. unbalanced current (3Io) sampling value≧ unbalanced current constant value（Ipdz）
3. unbalanced current duration time≧ over current delay（tipzd）
Protector action exit C7/C8, while driving the fault signaling relay C1/C3 (return after 10s). Panel emergency lamp lights.
PT line-break
1.RLP7 PT line-break--“turn on”;
2.a. The maximum line voltage is less than 30V, and any phase protective current is greater than 0.3A;
b. Negative sequence voltage is greater than 8V;
If meet any of the above conditions and the delay time of device over 10s, it happens PT line break
Capacitor protection measuring control device mainly used to the voltage levels of high voltage such as 35KV, 10KV, 6KV. The protection device provided the protection for current instantaneous trip, the time limit protection for current instantaneous trip, over current, over current back time limit.(general / very / extreme)、Over load, Zero sequence time delay current instantaneous trip, Zero sequence time delay current instantaneous trip , Zero sequence time delay current instantaneous trip ,Zero-Sequence definite time over-current anti time limit (general / very / extreme), Zero sequence time delay current instantaneous trip , over voltage, low voltage, PT disconnection, PT no-voltage , control circuit disconnection such perfect protection device,widely used in
1、Protection function:
01. protection for current instantaneous trip (Trip)
02.protection for time delay current instantaneous trip (Trip)
03. Over current (Trip)
04. Inverse time over-current (General / very / extreme)
05. Over load (Alarm / trip
06 Zero-Sequence Inverse time Over-current (tripping operation)
07.Zero sequence time delay current instantaneous trip (Trip)
08.Zero sequence time delay current instantaneous trip (trip)
09. Zero-Sequence definite time over-current (General / very / extreme)
10.Zero sequence time delay current instantaneous trip (alarm / trip)
11.Over voltage (trip)
12．low voltage (Trip)
13． PT line-break (alarm)
14.PT no-voltage (alarm)
15. loss of close circuit and trip circuit (alarm)
Description: in the conditions, the protection function can be increased to meet the needs of the field.
Remote control function:
01.Measuring current:IA、IC（sampling value*N2），Ia、Ic（ sampling values)；
02. Protection current:ia、ib、ic（ sampling value）；
03.Bus voltage：UAB、UBC、UCA（sampling value*N2)，Uab、Ucb（ sampling values);
04. Zero sequence time delay current instantaneous trip ：i0（Twice times value）；
05. frequency：f；
06. power：P、Q（sampling value*N2);
07.power factor：cos Ф；
Control function:
01.the local closing and local tripping of Circuit breaker
02. The remote closing and remote tripping of Circuit breaker
Auxiliary function:
01. Operation instruction：When the device is running normally,“run”Indicator light flashes regularly;
02. Power instruction：When the device is running normally,“Power Supply”The indicator light is always on;
03. Abnormal device：checksum error-default，Blocking relay is Open；
04．Device alarm:electric current、Voltage达To set the initial value and keep to the set time;
05. Device trip：Current, voltage Achieve the set trip value and keep it to the set time;
06. Close and brake instructions：the instruction of close or brake ；
07.Event record：Record 32 protection events, 32 remote events, 8 self test events;
08. Online modification:“Protection and retreat”and“Protection fixed value”Modify can be directly modified by computer communications to save;
09.Online print:Any interface in the protection menu can be printed directly after computer communication;
10. Communication function：With 485 communication mode.
protective action principle
protection for current instantaneous trip、protection for time delay current instantaneous trip 、Inverse time over-current、Over load ,Zero sequence time delay current instantaneous trip、Zero sequence time delay current instantaneous trip 、Zero sequence definite time over current instantaneous trip and Zero-Sequence Inverse time Over-current 、Zero sequence time delay current instantaneous trip、Over voltage、low voltage、PT line Break,the break principle of PT no-voltage ,control circuit the same as 9511Line protection measurement and control device
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