Compact circuit breaker 3VU13 and 3VU16 circuit breakers are compact circuit breakers with a maximum rated current of 63A. Work according to the principle of current limiting. Can be used for starting, disconnecting, overload and short circuit protection of motors or other loads; 3VU13 and 3VU16 can also be used as motor phase failure protection. When used for motor or equipment protection, the above circuit breakers are equipped with overcurrent instantaneous release and inverse time delay overload release. Due to the overload protection of the starter combination device itself, the 3VU16 used for starter combination only has an overcurrent instantaneous release installed. Circuit breakers and contactors can be combined to form a fuse free combination starting device. Siemens miniature circuit breaker code labeling method: 3VU13 0.1-25A 3VU16 1~63A Example: 3VU1340- MB00, each meaning is 3VU13-- Serial code 40--- Product production code M -- -- Product use, M is for motor protection T is for transformer primary protection with high surge current C is for starter combination protection L is for line protection B -- -- Current size, B-0.16A C-0.24A D-0.4A E-0.6A F-1A G-1.6A H-2.4A J-4A K-6A L-10A M-16A N-20A P-25A S-0.2A 16MP-32A 16MQ-40A 16MR-52A 16LS-63A 00-- -- Number of normally open and normally closed contacts, 00 without auxiliary contacts. 01 is 1 normally open, 1 normally closed, 02 is 2 normally open, 0 normally closed, 03 is 0 normally open, and 2 normally closed The 3VU9131 series is a circuit breaker accessory product. For example: 3VU9 131-3AA00 auxiliary contact 3VU9 131-7AA00 Short Circuit Fault Display 3VU9 132-0AB15 undervoltage release 15 is 50HZ 230V 25 is 50HZ 240V 17-50HZ 400V 18-50HZ 415V 23-60HZ 120V 24-60HZ 208V 26-60HZ 240V 3VU9 132-0AB50 shunt trip up 3VU9 138-2AB00 current limiter 3VU9 138-1AA14 Remote Control Mechanism 3VU9 133-1PA01 door interlock operating mechanism The 3VU9 133-2CA00 protective cover is divided into two protection levels: IP54 and IP55 3VU9 168-0KA00 locking device In addition, Siemens miniature circuit breakers also come in the 3RV series, which are fully imported products.   Miniature circuit breaker Model example: 5SJ62637CR 5SJ -- Product series number SJ -- Circuit breaker series SJ is a conventional miniature circuit breaker SY is a compact miniature circuit breaker TE is an isolation switch SU is a miniature circuit breaker with leakage protection SD is a miniature circuit breaker with surge protection 6-- Product review number 2-- There are still 1, 2, and 3 poles left 63-- Current size, in addition to 0.5 1 2 4 6 10 13 16 20 25 32 40 50 63A 7CR - Domestic factory production code   Molded case circuit breaker Common products of Siemens molded case circuit breakers are 3VL and 3VF series circuit breaker models 3VL17 02-1DA33 Model definition: 3VL circuit breaker series, 3VL is the standard breaking capacity circuit breaker, and 3VF is the circuit breaker with thermal magnetic release 17--- Short circuit instantaneous setting current 17 is 300-1000A 27 is 300-1600A 37 is 1000-2500A 47 is 1000-4000A 57 is 1575-6500A The corresponding 3VF series should be 31 32 33 42 52 62 02--- Overload current size 02-20A 03-32A 04-40A 05-50A 06-63A 08-80A 10-100A 12-125A 16-160A 20-200A 25-250A 31-315A 40-400A 50-500A 63-630A 1DA33- The product order number also includes 1DA33 1DC33 1DD33 1DC36, which includes parameters such as product breaking capacity Breaking capacity N H L When the voltage is 380-415V, N is 40KA H is 70KA L is 100KA The number of poles can be divided into 3P and 4P According to the applicability of the product, optional accessories such as auxiliary alarm switches, electronic releases, shunt undervoltage releases, motor operating mechanisms, extension terminals, cable connectors, etc. can be provided. Dimensions L x H x D (mm): 3VL160 3P: 174.5 x 104.5 x 90.5 4P: 174.5 x 139.5 x 90.5 3VL250 3P: 185.5 x 104.5 x 90.5 4P: 185.5 x 139.5 x 90.5 3VL400 3P: 279.5 x 139 x 115 4P: 279.5 x 183.5 x 115 3VL630 3P: 279.5 x 190 x 115 4P: 279.5 x 253.5 x 115