


TXCM1 Molded Case Circuit Breaker
Moulded Case Circuit Breaker | MCCB
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SCOPE OF APPLICATION
TXCM1 Molded Case Circuit Breaker (CM1-400, hereinafter referred to as MCCB), is new circuit breakers which have been designed and developed by the company using international advanced technology. The circuit breakers are of the following characteristics: compact size, high breaking capacity, short arc-over distance and shakeproof, is ideal products applied on land or ships. The rated insulation voltage of the circuit breaker is 800V (500V for TXCM1-63), it is suitable for the distribution network of AC 50Hz / 60Hz, rated working voltage of 690V and rated current of 1250A, to distribute power and protect circuit and power equipment from being damaged caused by overload , short-circuit, under-voltage and other fault. Also for protection infrequent conversion of the circuits and infrequent start of motor and overload, short circuit, under voltage.
TXCM1 circuit breaker can be mounted vertically (upright) or horizontally (transverse).
TXCM1 MCCB is suitable for isolation and the symbol is " ".
TXCM1 MCCB meets the standard: GB14048.2 "low-voltage switchgear and control equipment, Part 2: circuit breakers."
NORMAL OPERATING CONDITIONS
■ Ambient air temperature: -5℃~+40℃, and average temperature in 24h is below +35℃. ■ Altitude: The altitude of the installation site is not more than 2000m. ■ Atmospheric conditions: The air relative humidity in the highest temperature +40℃ is not more than 50%; In the low temperature can have higher relative humidity. The maximum average relative humidity is 90%, while the average monthly minimum temperature is +25℃, and consider the temperature changes in product on the surface of the gel. ■ Pollution Degree: 3.
NORMAL OPERATING CONDITIONS
Accessory name | Accessory code | ||||||||
Instant aneous release | Double releae | 63A,100A | 63A,100A,225A,400A | 630A630A | 800A | 1250A | |||
2-poles | 3-poles | 4-poles | 3-poles | 4-poles | 3-poles | 3-poles | |||
Without accessory | 200 | 300 | ![]() |
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Alarm contact | 208 | 308 | ![]() |
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Shunt release | 210 | 310 | ![]() |
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Pre-paid meter dedicated release |
210Y | 310Y | |||||||
Auxiliary contact | 220 | 320 | ![]() |
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Undervoltage release | 230 | 330 | ![]() |
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Shunt release | 240 | 340 | - | ![]() |
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Auxiliary contact | 240Y | 340Y | - | ||||||
Shunt release | 250 | 350 | - | ![]() |
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Undervoltage release | 250Y | 350Y | - | ||||||
Two sets of auxiliary contacts |
260 | 360 | - | ![]() |
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Auxiliary contact, Undervoltage release |
270 | 370 | - | ![]() |
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Shunt release | 218 | 318 | - | ![]() |
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Alarm contact | 218Y | 318Y | - | ||||||
Auxiliary contact, Alarm contact |
228 | 328 | - | ![]() |
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Undervoltage release, Alarm contact |
238 | 338 | - | ![]() |
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Shunt release, Auxiliary contact |
248 | 348 | - | ![]() |
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Alarm contact | 248Y | 348Y | |||||||
Shunt release, Undervoltage release, Alarm contact |
258 | 358 | - | - | - | - | - | ||
Two sets of auxiliary contacts, Alarm contact |
268 | 368 | - | ![]() |
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Auxiliary contact, Undervoltage release, Alarm contact |
278 | 378 | - | ![]() |
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A. 200 means circuit-breaker with electromagnetic release; 300 means thermodynamic+electromagnetic release; and 000 means circuit-breaker without release and internal accessory. B. 125, 250, 400, 2-pole products only have 210, 220, 230, 310, 320, 330. C. Only TXCM1-63, TXCM1-100, TXCM1-225, TXCM1-400 with pre-paid meter dedicated release.
MAIN TECHNICAL INDEX
Rated value of the circuit break
Model | Pole | Rated current(A) | Rated operating voltage(V) |
Rated insulation voltage(V) |
Rated ultimate short - circuit breaking capacity (Icu) |
Flashover distance(mm) |
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Test voltage (V) | Icu (kA) | Ics (kA) | ||||||
TXCM1-63L | 3 | 10、16、20、25、 32、40、50、63 |
400 | 500 | 400×1.10 | 25 | 18 | 0 |
TXCM1-63M |
3、4 |
50 | 35 | |||||
TXCM1-100L | 3、4 | 16、20、25、32、40、 50、63、80、100 |
400 | 800 | 30 | 22 | ≤50 | |
TXCM1-100M | 2、3、4 | 50 | 35 | |||||
TXCM1-100H | 3 | 85 | 50 | |||||
TXCM1-100L | 3、4 | 690 | 10 | 5 | ||||
TXCM1-100M | 2、3、4 | 20 | 10 | |||||
TXCM1-225L | 3、4 | 100、125、140、 160、180、200、225 |
400 | 800 | 35 | 25 | ||
TXCM1-225M | 2、3、4 | 50 | 35 | |||||
TXCM1-225H | 3 | 85 | 50 | |||||
TXCM1-225L | 3、4 | 690 | 10 | 5 | ||||
TXCM1-225M | 2、3、4 | 20 | 10 | |||||
TXCM1-400L | 3 | 225、250、315、 350、400 |
400 | 800 | 50 | 35 | ≤100 | |
TXCM1-400M | 3、4 | 65 | 42 | |||||
TXCM1-400H | 3 | 100 | 65 | |||||
TXCM1-400L | 3 | 690 | 15 | 8 | ||||
TXCM1-400M | 3、4 | 20 | 10 | |||||
TXCM1-630L | 3 | 400、500、630 | 400 | 800 | 50 | 35 | ||
TXCM1-630M | 3、4 | 65 | 42 | |||||
TXCM1-630H | 3 | 100 | 65 | |||||
TXCM1-630L | 3 | 690 | 15 | 8 | ||||
TXCM1-630L | 3、4 | 20 | 10 | |||||
TXCM1-800M | 3 | 630、700、800 | 400 | 800 | 75 | 50 | ||
TXCM1-800H | 3 | 100 | 65 | |||||
TXCM1-800M | 3 | 4690 | 30 | 15 | ||||
TXCM1-1250 | 3 | 800、1000、1250 | 400 | 800 | 65 | 42 | ||
TXCM1-1250 | 3 | 690 | 25 | 12.5 |
Note: 2-poles, 4-poles circuit breakers, divided into L, M, H, they have the same breaking index as M-type.
Characteristics of inverse time breaking action of circuit breakers over-current release for power distribution when every pole is power-on at the same time
No. | Test current | I/In | Set time | Initial state |
1 | Conventional non-tripping current | 1.05 | 2h(In>63A),1h(In≤63A) | Cold |
0 | Conventional non-tripping current | 1.30 | 2h(In>63A),1h(In≤63A) | Immediately after Test 1 |
Instantaneous action characteristic setting value of the circuit breaker for distribution is 10In±20%, and instantaneous action characteristic setting value of the circuit breaker for motor protection is 12In±20%.

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