Emax CB配备PR332/P-PR333/P-PR122/P-PR123/P脱扣器。
检测到故障的每个断路器通过通信线立即向电源侧的断路器发送信号；断路器
不接收来自负载断路器的任何通信
侧应启动打开命令。
在本例中，当故障位于指示点时，断路器
D和E没有检测到故障，因此它们不与
电源侧的断路器（断路器B），其应启动
在40到200毫秒的选择性时间内打开命令。
为了正确启动区域选择性，建议进行以下设置：
S t
2.≥ 选择性时间+70毫秒
I I3=关闭
G.t
4.≥ 选择性时间+70毫秒
每个断路器的选择时间设置相同
A.
C
B
D
E
Ik
X1N 800PR332/P
退出
在
X1N 800PR332/P
退出
在
退出
在
X1N 1000PR333/P输出
在
E3N 2500PR123/P
退出
在E4S 4000PR123/P中
120保护和控制装置| ABB
3保护协调
3.1保护协调
1SDC200560F0001
Tmax型断路器（T4L-T5L-T6L）的区域选择性
PR223 EF释放
上述示例显示了通过联锁协议（联锁，IL）连接的电厂，以便通过PR223 EF释放保证区域选择性。
如果发生短路，断路器立即位于
故障通过总线分层向保护装置发送闭锁信号
并在跳闸前验证模拟闭锁信号是否未被触发
由负载侧的保护装置发送。
在图中的示例中，断路器C直接位于电源侧
对于故障，向断路器a发送闭锁信号，断路器a是分层的
较高的。如给定示例所示，如果负载侧不存在保护，
断路器C应在很短的时间内断开，因为它没有收到任何
阻塞信号。
与使用Emax系列空气断路器的区域选择性（40到200ms）相比，一切发生的时间更短（10到15ms），因此

Emax CB equipped with PR332/P-PR333/P-PR122/P-PR123/P releases. Each circuit-breaker detecting a fault sends a signal to the circuit-breaker immediately on the supply side through a communication wire; the circuit-breaker that does not receive any communication from the circuit-breakers on the load side shall launch the opening command. In this example, with a fault located in the indicated point, the circuit-breakers D and E do not detect the fault and therefore they do not communicate with the circuit-breaker on the supply side (circuit-breaker B), which shall launch the opening command within the selectivity time set from 40 to 200 ms. To actuate correctly zone selectivity, the following settings are suggested: S t 2 ≥ selectivity time + 70 ms I I3 = OFF G t 4 ≥ selectivity time + 70 ms Selectivity time same settings for each circuit-breaker A C B D E Ik X1N 800PR332/P OUT IN X1N 800PR332/P OUT IN OUT IN X1N 1000PR333/P OUT IN E3N 2500PR123/P OUT IN E4S 4000PR123/P 120 Protection and control devices | ABB 3 Protection coordination 3.1 Protection coordination 1SDC200560F0001 Zone selectivity for circuit-breakers type Tmax (T4L-T5L-T6L) with PR223 EF releases The example above shows a plant wired through an interlocking protocol (Interlocking, IL), so as to guarantee zone selectivity through PR223 EF release. In case of short-circuit, the circuit-breaker immediately on the supply side of the fault sends through the bus a block signal to the protection device hierarchically higher and verifies, before tripping, that an analogous block signal has not been sent by the protection on the load side. In the example in the figure, the circuit-breaker C, immediately on the supply side of the fault, sends a block signal to the circuit-breaker A, which is hierarchically higher. If, as in the given example, no protection on the load side is present, the circuit-breaker C shall open in very quick times since it has received no block signal. Everything occurs in shorter times (10 to 15ms) than in the case of zone selectivity with the Emax series air circuit-breaker (40 to 200ms), thus