GTL-823 Distance Protection Relay
It mainly used in 110kV/66kV voltage level of the line and feed outlet,
it set the protection, operation box, voltage switching, measurement, communications, record wave functions in one, in low pressure line of protection, monitoring and control, and circuit breaker control function. The operating circuit GTL-843 apply to conventional lines of 110kv and anti-jump atresia centralized GIS switchgear systems.
1.2 configuration and characteristics
Functional configuration table
Classification | Options | 823 |
Protection Function | Longitudinal phase current differential protection | √ |
Three-phase distance protection | √ | |
Three-ground distance protection | √ | |
4-stage zero sequence current (direction) protection | √ | |
TV break phase overcurrent | √ | |
A three-phase reclosing | √ | |
The asymmetric fault succession liquid | √ | |
Double the quick acting | √ | |
UFLS protection | √ | |
TV break detection | √ | |
The TV disconnected two paragraphs overcurrent | √ | |
Overload protection | √ | |
Dual-bus voltage switching | √ | |
Operating circuit | Single-, dual-coil, power is completely independent operating circuit lockout feature anti-jump | √ |
Control loop anomaly alarm function | √ | |
Monitoring and control functions | The Remote Communication acquisition, accident telesignalling | √ |
Breaker remote control division | √ | |
Control and alarm output | √ | |
I, U, P, Q, f telemetry | √ | |
Switch points closing number of statistics | √ | |
Event SOE alarm | √ | |
Fault recorder function | √ | |
Time | GPS on the network time | √ |
Communication | Ethernet, RS232/485 communication interface | √ |
Main features
a. 4U standard aluminum chassis, the combination of a plug-in structure, after mating chassis, various functional modules individually designed, the strength of electrical complete separation, strong anti-jamming capability, on-site maintenance convenience;
b. Multiple CPU intelligent plug-in designed to open into the open the plug-in to achieve real-time fully self-test; each relay coil can be detected;
c. Based CANBUS bus plug contact, reducing the connection between the plug, patch non-performing real-time detection;
d. Dual 32-bit systems, system redundancy; protection features produced by Texas Instruments 32-bit floating point DSP processor, run the program and data in the chip; running speed, high reliability;
e. Man-machine interface, network communications, and management functions produced by the Philips 32-bit ARM MCU, speed, storage capacity, network interface capability;
f. 16 AD sampling, measurement accuracy; sampling 48 points a week wave harmonic processing ability;
g. The protection module schematic design, computer-aided graphical interface secondary development and functional modifications to facilitate a series of products, flexible, fast and engineering design;
h. The complete circuit breaker operating circuit, has a remote control to jump, closing pressure atresia, spring discharged atresia closing function;
i. Flexible menu color or large color LCD, Chinese interface menu; flexibility to choose dual Ethernet, dual 485 interface;
j. To save less than 500 recent incident reports and run reports;
k. The man-machine management module uses real-time multi-tasking operating system, interface, network tasks such as real-time;
l. Can store 10 sets of protective setting, the dual setpoint District self-test and mutual inspection combined setpoint switching safe and convenient;
m. Power industry standard DL/T667-1999 (IEC 60870-5-103) standards-based communication protocol to facilitate computer monitoring or protection and management networked communications.