Bs En 60898 Type B Max Zs. For example for a 32 a type b circuit breaker to bs en 60898 or the overcurrent characteristics of a 32 a type b rcbo to bs en 61009 1 table 41 3 in amendment no. Calculate the maximum measured z s.
The ambient temperature is 20 o c and the circuit is wired in 2 5 mm 2 twin with cpc thermoplastic cable. Bs 1362 bs 3036 table 1 maximum measured values of zs for fuses. The table below provides maximum values of zs for fuses and circuit breakers.
3 gives the maximum z s value of 1 37 ohms at a nominal voltage u 0 of 230 v.
A circuit is protected by a 20 a type b circuit breaker to bs en 60898. Table 2 maximum measured values of zs for circuit breakers or the overcurrent characteristic of rcbos based on information as at january 2015 maximum measured values of earth fault loop impedance zs rated current a 0 4 sto 5 type 1 type 2 type b type 3 and c type d circuit breakers to bs 3871 or bs en 60898 or rcbos to bs en 61009. Nominal rating a fuses circuit breakers to bs 3871 or bs en 60898 or rcb0s to bs en 61009 bs 88 gg parts 2 and 6 bs 1361 or bs 1362 bs 3036 bs 88 2 fuse systems e bolted and g clip in bs88 3 fuse system c type 1 type 2 type b type 3 c type d. Bs 7671 18th edtion max zs values how to calculate max zs maximum zs value tables or save on the hassle and get the max zs values app.
