The hottest Mangkang molded case circuit breaker r

Munkang molded case circuit breaker rmm1

munkang molded case circuit breaker rmml/3300 model specification

I. scope of application

rmm1 Series Molded Case circuit breaker (CM1 molded case circuit breaker) is a new circuit breaker developed by adopting international advanced design and manufacturing technology. Its rated insulation voltage is 690V, which is suitable for infrequent switching and motor starting in circuits with AC 50Hz, rated working voltage of 400V and below, and rated working current of 800A and below. The circuit breaker has overload, short circuit and undervoltage protection devices, which can protect lines and power supply equipment from damage. According to the rated limit short-circuit breaking capacity (LCU), it is divided into four types: C type (economical type), L type (standard type), M type (higher breaking type) and H type (high breaking type). With the characteristics of small size, high breaking height, short flying fox, anti vibration, etc., it is an ideal product for land and ship use. The molded case circuit breaker can be installed vertically (i.e. vertically) or horizontally (i.e. horizontally). The product meets the requirements of IEC and gb14048.2 standards. 2、 Model and specification

common types electronic transformer variable frequency power sensor is an electronic transformer. The variable frequency power sensor can obtain the effective value of voltage by AC sampling the input voltage and current signals, and then pay attention to the exhibitors to connect the sampling value with the digital input secondary instrument through cable, optical fiber and other transmission systems. The digital input secondary instrument calculates the sampling value of voltage and current, Current effective value, fundamental voltage, fundamental current, harmonic voltage, harmonic current, active power, fundamental power, harmonic power and other parameters. [3]。 Note: 1 There is no code for the direct operation of the handle, the rotation operation is represented by Z, and the electric operation is represented by p; 2. The circuit breaker without release, which is only used as isolation, is represented by 000; 3. Protect the new steel bar bending experimental machine produced by our company, which is designed for the new standard gb/t1499.2 ⑵ 018. The motor is represented by 2, and the power distribution is without code; 4. Structure code of neutral pole (N pole) of four pole circuit breaker; Type A: the N-pole is not equipped with overcurrent tripping elements, and the N-pole is always connected and is not closed and opened together with other three poles; Type B: the N-pole is not equipped with overcurrent tripping elements, and the N-pole is closed and opened together with other three poles; Type C: the N-pole is equipped with overcurrent tripping elements, and the N-pole is closed and opened together with other three poles; Type D: the N-pole is installed with an overcurrent tripping element, and the N-pole is always connected and does not open and close with other three poles

III. applicable working environment

■ altitude of 2000 meters and below ■ the surrounding medium temperature is not higher than plus 40 degrees Celsius, turning the external economic pressure into an internal driving force for reform (for marine products, it is plus 45 degrees Celsius), not lower than minus 5 degrees Celsius. ■ be able to withstand the influence of humid air; ■ it can withstand the influence of salt fog and oil stain; ■ able to withstand the influence of mold; ■ be able to withstand the effects of nuclear radiation; ■ the maximum inclination is 22.5 degrees; ■ it can work reliably and normally when it is subject to normal vibration of the ship; ■ it can work reliably in case of earthquake (4G); ■ it can work reliably in a medium without BAOZA danger, and the medium has no gas and conductive dust that are sufficient to corrode metals and destroy insulation; ■ it can work reliably where there is no rain and snow erosion

type comparison voltage transformer (PT) and current transformer (CT) are important electrical equipment in power system. They undertake the functions of isolation between high and low voltage systems and conversion from high voltage to low voltage. If the wiring is correct, the wear measurement error will increase or not, which is of great significance to the normal work of system protection, measurement, monitoring and other equipment. When the Pt and CT are newly installed and put into operation or the Pt and CT secondary cables are replaced, using the polarity test method to check the correctness of the Pt and CT wiring has become an essential working procedure for relay protection workers

IV Main parameters and technical performance

shell level rated current LNM (a) 100 models rmmcrmmlrmmmmmmh rated current ln (a) 16, 20, 25, 32, 40, 50, 63, 80, 100 poles 3343 rated insulation voltage uiac800v rated working voltage Ue AC 400V/AC690V rated frequency 50Hz arcing distance ≤ 50mm rated ultimate short-circuit breaking capacity LCU (KA) rated operating short-circuit breaking capacity LCS (KA) operating performance (Times) electrical life 1500 mechanical life 8500 accessories (optional) shunt release ●●●●● undervoltage release ●●●● auxiliary contact ●●●●●● alarm contact ●●●●● electric operating mechanism ●●●●● rotating handle operating mechanism ●●●●● overall dimension ab150c86104d6886 installation dimension ab129 φ D5

shell level rated current LNM (a) 225 model rmmcrmmlrmmmmmmh rated current ln (a) 100, 125, 140, 160, 180, 200, 225 number of poles 3343 rated insulation voltage uiac800v rated working voltage Ue AC 400V/AC690V rated frequency 50Hz arcing distance ≤ 50mm rated ultimate short circuit breaking capacity LCU (KA) rated operating short circuit breaking capacity LCS (KA) operating performance (Times) electrical life 1500 mechanical life 8500 accessories (optional) Shunt release ●●●●● undervoltage release ●●●●● auxiliary contact ●●●●● alarm contact ●●●● electric operating mechanism ●●●●● rotating handle operating mechanism ●●●●●● overall dimension ab165c110127d86103 installation dimension ab126 φ D5

shell level rated current LNM (a) 400 model rmmcrmmlrmmmmmmh rated current ln (a) 200, 250, 315, 350, 400 pole number 3343 rated insulation voltage uiac800v rated working voltage Ue AC 400V/AC690V rated frequency 50Hz arcing distance ≤ 100mm rated ultimate short-circuit breaking capacity LCU (KA) rated operating short-circuit breaking capacity LCS (KA) operating performance (Times) electrical life 1000 mechanical life 4000 accessories (optional) Shunt release ●●●●● undervoltage release ●●●●● auxiliary contact ●●●●● alarm contact ●●●● electric operating mechanism ●●●●● rotating handle operating mechanism ●●●●●● overall dimension ab150c155146.5d105106.5 installation dimension ab194 φ D7

voltage transformer with ungrounded primary winding: both terminals of the primary winding of single-phase voltage transformer are insulated from the ground; All parts of the primary winding of three-phase voltage transformer, including the wiring terminal, are insulated from the ground, and the insulation level is consistent with the rated insulation level. According to the magnetic circuit structure, it is divided into single-stage voltage transformer: primary winding and secondary winding (multiple secondary windings can be arranged to be wound on the same iron core according to needs, and the iron core is the ground potential. In China, single-stage voltage transformer is used at and below voltage levels.

shell level rated current LNM (a) 630 type number rmmcrmmlrmmmrmmh rated current ln (a) 250, 315, 350, 400, 500, 630 number of poles 3343 rated insulation voltage uiac800v rated working voltage Ue AC 400V/AC690V rated frequency 50Hz arcing distance ≤ 50mm rated ultimate short-circuit breaking capacity LCU (KA) rated operating short-circuit breaking capacity LCS (KA) operating performance (Times) electrical life 1000 mechanical life 4000 accessories (optional) Shunt release ●●●●● undervoltage release ●●●●● auxiliary contact ●●●●● alarm contact ●●●● electric operating mechanism ●●●●● rotating handle operating mechanism ●●●●●● overall dimension ab270280c160155d110115.5 installation dimension ab200243 φ D7

shell level rated current LNM (a) 800 model rmmmrmmh rated current ln (a) 630, 700, 800 number of poles 333 rated insulation voltage uiac800v rated working voltage Ue AC 400V/AC690V rated frequency 50Hz arcing distance <100mm rated limit short-circuit breaking capacity LCU (KA) 75100 rated operation short-circuit breaking capacity LCS (KA) 5065 operating performance (Times) electrical life 1000 mechanical life 2500 accessories (optional) Shunt release ●● undervoltage release ●● auxiliary contact ●● alarm contact ●● electric operating mechanism ●● rotating handle operating mechanism ●● boundary dimension a275275b210c107107d installation dimension ab φ D

current transformers combined together. Combined transformer can change high voltage into low voltage and large current into low current, so as to achieve the purpose of electric energy measurement. Clamp current transformer clamp current transformer is a precision current transformer (DC sensor), which is specially designed for the use characteristics of power field measurement and measurement. This series of mutual inductors are made of high magnetic conductivity materials with high precision. Linear excellent. Strong anti-interference ability, etc. When in use, it can be directly connected to the busbar or busbar without power cut-off, which is very convenient to use. It can cooperate with a variety of measuring instruments, electric energy meter field calibrator, multi-function electric energy meter, oscilloscope. Combined transformer combined transformer is a voltage transformer digital multimeter, double clamp grounding resistance tester, double clamp phase volt ampere meter, etc., which can measure and compare a variety of electrical parameters under the condition of continuous power supply

v. ordering instructions

when ordering, the following points should be indicated: product model and name: such as RMMM (CM1 molded case circuit breaker)/RMMH molded case circuit breaker instantaneous tripping rated current: such as 225A. Pole number: 3P order quantity: such as 1000

oil immersed current transformer: insulated by insulating paper and insulating oil, it is generally outdoor type. At present, various voltage levels are commonly used in China; Gas insulated current transformer: the main insulation is composed of gas. According to the principle of current transformation, it is divided into electromagnetic current transformers: current transformers that realize current transformation according to the principle of electromagnetic induction

but the manufacturing process of the auxiliary iron core compensation method is relatively complex. Capacitance compensation, directly connect the capacitance at both ends of the secondary winding in parallel. Its contrast difference plays a positive compensation role, and the compensation size is proportional to the x component in the secondary load z=rix, and is proportional to the size of the compensation capacitance; The diagonal difference plays a negative compensation, and the compensation size is directly proportional to the R component in the secondary load z=rix and the compensation capacitance. Capacitance compensation is an ideal compensation method. In micro precision current transformers, generally, the secondary winding is directly connected to the current/voltage conversion of the operational amplifier, and the secondary impedance is basically 0. At this time, the role of capacitance compensation is relatively small. The angle difference can be compensated. Generally, the phase-shifting circuit can be added in the current/voltage conversion stage to solve the angle difference problem. The user can adjust and calculate the phase-shifting circuit according to the inspection error data in the inspection report of the current transformer when it leaves the factory

2, when the 10kV outgoing line is single-phase grounded, the non fault phase to ground voltage at the primary side of the voltage transformer is 3 times the root of the normal voltage value. The iron core of the voltage transformer soon saturated, and the exciting current increased sharply, causing the fuse to fuse. 3. The components with capacitive and inductive parameters in the power network, especially the ferromagnetic inductive components with iron core, cause ferromagnetic resonance when the parameter combination is unfavorable