JGL-110 series inverse time overcurrent relayDetailed product description：

Purpose:

JGL-110 series integrated circuit inverse time overcurrent relay (hereinafter referred to as relay). It is composed of conventional integrated circuits and digital circuits, and its I-t delay characteristics comply with the International Electrotechnical Commission IEC255-4 standard. At the same time, considering the interchangeability of domestic electromagnetic (GL type) inverse time overcurrent relays, non-standard inverse time characteristic relays can also be provided according to actual system operation requirements. Each relay in this series is equipped with a low transient over trip outlet. When combined with other types of relays, it can form different types of protection functions. Therefore, it can be applied to relay protection of various types of power equipment.
At present, the transmission and distribution systems with voltage levels below 35kV in China's power system generally adopt current protection with incomplete star connection for protection configuration. Overcurrent protection is mostly used, among which overcurrent protection is generally timed or inverse timed. Considering the traditional practice of relay protection in China, this relay adopts two-phase current protection. Overcurrent protection can be selected with inverse time or definite time, and both overcurrent and quick break of the two phases can be independently set. Overcurrent and quick break have independent tripping outlets and alarm signal output contacts.

JGL-110 series inverse time overcurrent relay model name:



Working Principle:
The CT secondary current forms a weak voltage through the converter, and the inverse time starting current is set, filtered, rectified, filtered, and automatically extracts the maximum fault phase current, which is sent to level detection to form an open circuit. The characteristic quantity is inserted into the circuit to form different types of inverse time characteristic curves. The V-F circuit is sent to the timer, and when it is consistent with the set delay, the circuit sends a pulse signal to the amplifier to drive the KF inverse time outlet relay. Quick break setting and automatic extraction of the maximum fault phase current are sent to the integral level detector. After being judged against the preset level, a pulse signal is sent to the amplifier to drive the KS quick break output relay.

Usage:
4.1 The time limit characteristics of this relay can meet the requirements of IEC255-4, and can also comply with other types of inverse time limit relays. The A, B, and C types of inverse time limit characteristic curves specified in IEC255-4 are expressed as follows:

A:t=I*=0.14k/2/I*0.02－1(s)
B:t=13.5k/2/I*－1(s)
C:t=80k/2/I*2－1(s)
G: T=0.236k/2/I * 0.02-1 (s) (replacing GL type relay)
In the formula:
I * - The fault current is the standard value of the starting current
I *=I - actual fault current/IF - starting current setting value
If I * is not greater than 1.2, it is not recommended to use the segment
K: Action time displacement scale k=0.1~9.9DK=0.1
t: Relay action time unit (s)
4.2 Inverse time limit starting current setting The starting current setting value mainly depends on the short-circuit current of the protected equipment. According to the protection range of the fault current, the value of the IF dial switch is changed. According to the panel calculation formula, the setting value IF of the inverse time limit starting current can be obtained.
4.3 Inverse time characteristic time setting Inverse time characteristic time setting is mainly used to cooperate with various levels of inverse time protection, so that the protection can selectively and quickly cut off faults. The time limit requirement can be selected according to the I-t characteristic diagram to select any curve in the curve bundle, and the dial switch value of K value can be turned to indicate one of the curve bundles. When a timed overcurrent protection is required, simply turn the inverse/timed limit function switch to the timed limit position, and the timed limit time will be the value of the K switch.
4.4 In order to cooperate with the inverse time limit outlet and solve the problem that the inverse time limit cannot meet the operating requirements and quickly cut off nearby faults in different states, the value of the dial switch of the instantaneous current setting value IS is multiplied by the value of IF to obtain the instantaneous current setting value of IS.
4.5 This relay is a two-phase or single-phase overcurrent, and the operating currents of the two phases can be set separately.



Main technical parameters:
5.1 Rated value: AC current IN: 1A, 5A, 10A;
Communication frequency FN: 50Hz, 60Hz;
Auxiliary DC voltage: 48V ± 10%, 110V/220V ± 20%.
5.2 Inverse time starting current: IF=0.1IN (1-10.9).
That is, when IN=1A, the IF setting range is 0.1A to 1.09A;
When IN=5A, the IF setting range is 0.5A-5.45A;
When IN=10A, the IF setting range is 1A to 10.9A.
5.3 Rapid current: IS=(2-21.8) IF.
That is, when IN=1A, the IS setting range is 0.2A to 23.76A;
When IN=5A, the IS setting range is 1A to 118.8A;
When IN=10A, the IS setting range is 2A to 237.6A.
(Note: Setting current greater than 100A is not recommended) Inverse time delay scale: K=0.1-9.9.
Time limited delay: t=(0.1~9.9) s
5.4 Action time: For inverse time delay, please refer to the appendix.
Rapid action shall not exceed 60ms at 1.2IS;
Under 2IS, it should not exceed 30ms.
The consistency of action time shall not exceed ± 5%.
5.5 Error
The current setting value shall not exceed ± 5%;
The inverse time setting value shall not exceed ± 5% (± 10% when I * is less than 2);
The time limit setting value shall not exceed ± 10%+20ms.
5.6 Return time:
The inverse time limit is at 15IF, and the quick action is 60ms at 10IS
5.7 Return coefficient: not less than 0.9.
5.8 Power consumption: not exceeding 0.8VA/phase under AC current loop IS;
Under the DC voltage circuit, the voltage should not exceed 10W.
5.9 The overload capacity of the current circuit can withstand continuous operation under 2IN (IN=1A, 5A);
10s under 10IN;
40IN for 1 second.
5.10 Contact output: main contact overcurrent 2 conversion;
Quick 2 conversion.
Signal contact 1 is open/closed.
5.11 Contact Capacity:
Disconnected: DC 250V/0.5A,=5ms ± 0.75ms, with a capacity of 50W;
250V/2A communication, coso=0.4 ± 0.1, with a capacity of 250VA.
5.12 Voltage Test: Insulation Test 2kV, 50Hz, 1min between different circuits; 1kV, 50Hz, 1min between contacts of the same group.
5.13 Allowable operating temperature range: -10 ℃ to+40 ℃.
5.14 Storage temperature: -25 ℃ to+75 ℃.
5.15 Weight: not exceeding 2.2kg.

Wiring diagram behind the relay:
The contacts in the picture are in a state where the relay is not powered or not functioning



Relay external dimensions and opening dimensions:
Refer to Figures 4 and 8 in the protruding modular insertion structure.

Ordering instructions:
8.1 Relay name and model.
8.2 Auxiliary DC voltage rating and rated current (if there are special requirements, please specify separately).
8.3 If the contact form is a special requirement, please specify it separately.
8.4 Order quantity.
8.5 ABB structure relay matching: relay base and several sockets (to be ordered separately).

JGL-110 series inverse time overcurrent relay（No image available）