High-Speed Digital Distance Protection and Control Relay

1. Application range
GTL-823 digital line protection and monitoring devices/ micro distance protection and control relay, mainly used in the circuit and feed line of 110kV/66kV voltage level, it sets the protection, operation box, voltage switching, measurement, communications, record wave functions in one, to realize protection,
monitoring, control and circuit breaker control function in mid&low-voltage transmission line.
The operating circuit GTL-823 apply to conventional lines of 110kv and anti-jump interlock centralized GIS switchgear systems.

2. Configuration and characteristics
Functional configuration table

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 interlock, spring discharged interlock 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 value zone District self-test and mutual
inspection combined setting value 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.

3. Technical indicators
3.1 rated data
a. Rated DC voltage: 220V (110V when ordering) Tolerance + 15% - 20%

b. The rated AC data: phase voltage                  100 / √3 V
                             Zero-sequence voltage          100V
                                                AC current           5A (1A ordering, specify)
                                       Rated frequency           50Hz (60Hz ordering, specify)

c. Thermal stability:
AC voltage circuit: the long-running          1.4Un
AC current loop: a long-running                2In
                                            10s                20In
                                              1s                40In

3.2 Power Consumption
a. AC voltage circuit: each phase is not more than 0.5VA;

b. AC current loop: In = 5A when each phase is not greater than 1VA; In = 1A when each
phase is not greater than 0.5VA;

c. Protect the power circuit: normal working hours, not more than 10W; protection action, not more than 15W.

3.3 The main technical indicators
3.3.1 AC voltage, current, accurate scope of work (10% error)
1) Phase voltage: 0.3V ~ 70V
2) Line extraction voltage: 0.5V ~ 120V
3) Current: 0.08In 20In (In means the device rated current of 1A or 5A, the same below)

3.3.2 Distance Protection
1) Tuning range:
0.01Ω ~ 50Ω (In = 5A)
0.05Ω ~ 200Ω (In = 1A)
2) Impedance action value accuracy:
The line impedance angle, to meet from Seiko current, voltage condition, the measured
impedance tuning value the average error does not exceed ± 2.5% or ± 0.01Ω (In = 5A)
or ± 2.5% or ± 0.05Ω (In = 1A).
3) I segment transient overreach is not greater than ± 5%;
4) II, III segment delay time components: 0.2s ~ 10s, tuning error does not exceed ± 1%
or ± 20ms;
5) I segment the entire set of actions time: I segment tuning delay 0s, not more than 0.7
times setting impedance 25ms;

3 3.3. Direction of zero sequence current protection
1) Tuning range: 0.1In to 20In, tuning error does not exceed ± 2.5% or ± 0.01In;
2) Zero-sequence power directional element action area: The sensitive angle error does not exceed ± 2 °;
3) Delay time elements: 0.1s ~ 10s, the error is less than ± 1% or ± 20ms;

3.3.4 reclosing
1) The tuning range of the same period angle: 10 ° ~ 60 °;
2) The seized line without pressure components tuning range: 10V ~ 100V;
3) Reclosing time delay element: 0.2s ~ 12s, the error does not exceed ± 1% or ± 40ms;
4) Same period angle setting error: not greater than ± 2 °.

3.3 5 low cycle load shedding
1) Setting range: 45 Hz ~ 49.5 Hz;
2) Delay time element: 0.1 s ~ 30s;
3) Slip tuning range: 0.5 Hz / s to 20 Hz / s;
4) Tuning error: no more than ± 0.02 Hz;
5) The time element tuning error: no more than ± 2% or 100 ms;
6) Slip interlock tuning error: no more than ± 10% or 0.2 Hz / s.

3 3.6 Ranging portion
Allows single-ended power metal failure error: error not greater than ± 2.5%; larger transition resistance will increase.

3.4 Environmental conditions
a. Ambient temperature:
Work: -25 ºC ~ +55 ºC.
Storage: -25 ºC ~ +70 ºC, relative humidity less than 80%, containing acidic, alkaline
or other corrosive and explosive gases rain, snow indoor ambient air; incentive not
applied under the limit amount irreversible changes, the device does not appear, the
temperature is restored, the device should be able to work properly.

b. Relative humidity: the wettest month average monthly maximum relative humidity of
90%, while the average minimum temperature for the month of January is 25 ºC and
surface condensation. The maximum temperature of +40 ° C, the average maximum
humidity does not exceed50%.

c. Atmospheric pressure: 80kPa ~ 110kPa (relative altitude of 2km below).

3.5 anti-jamming performance
a. Burst disturbance tests: the bear GB/T14598.13 - 1998 under the frequency of 1MHz
and 100kHz attenuation Sasser (first half-wave voltage amplitude common mode 2.5kV,
differential mode 1kV) burst disturbance tests.

b. Fast transient disturbance test: can withstand the severities GB/T14598.10 - 1997 under Chapter IV fast transient interference test.

c. Radiated electromagnetic field immunity test: can withstand the severities GB/T14598.9
- 2002 under Chapter III level radiation electromagnetic field immunity test.

d. Electrostatic Discharge test: can to withstand GB/T14598.14 - and 1998 in 4.1 under the severities of class III electrostatic discharge test.

e. Electromagnetic emission tests: can withstand GB/T14598.16 - 2002 in 4.1 under the
conduction of radiation emission limits, emission limits and 4.2, Electromagnetic
emission tests.

f. Frequency magnetic field immunity test: can withstand the severities GB/T17626.8 -
1998 5 under Chapter IV level of power frequency magnetic field immunity test.

g. Pulse magnetic field immunity test: can to withstand GB/T17626.9 - 1998 5 under
Chapter IV level pulsed magnetic field immunity test severities.

h. Damped oscillatory magnetic field immunity test: can to withstand GB/T17626.10 -
1998 5 under Chapter IV level of Damped oscillatory magnetic field immunity test
severities.

i. Surge immunity test: able to withstand the severities of IEC 60255-22-5: 2002 Chapter 4
provides IV grade surge immunity test.

j. Immunity to conducted disturbances test: can withstand immunity test IEC 60255-22-6:
2001 the provisions of Chapter 4 of the RF field induced conducted disturbances.

k. Frequency immunity test: can withstand 5kV (peak) standard lightning impulse test.