Submersible 2X313 Three Phase 3F Circuit Breaker [35mm]
- Model: MT3P2X313T110
- 110℃
- 120℃
- 130℃
35mm mounting hole submersible three phase circuit breaker used for 225KVA/300KVA three phase oil immersed distribution transformer at 120/240 volts
Low loss, High interrupting capabllity
Resetting Mechanlsm&Emergency Control, Easy for Malntalnance
Complete Certification
Specifications
| Model | MT3P2X313T110 |
| Rated Current | 626A |
| For Transformer | 225KVA |
| Rated Voltage | 208V/120V |
| Trip Temp. | 110℃, 120℃, 130℃ |
| Phase | 3F |
| Mounting Hole Diameter | 35mm |
| Mounting Surface | CURVED/FLAT |
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Standards
❖ Standards for Reference:
- ANSI C 57.109-2018 (Revision of lEEE Std c57.109-1993) lEEE Guide for liquid-immersed Transformer through-Fault-Current Duration
- lEEE Standard C37.91 -2008, lEEE Guide for Protecting Power Transformers.
- IEEE Standard C57.91-2011/IEEE C57.12.00-2015 /IEEE C57.12.90-2015
- IEEE C37.13-2015 /IEEE C37.50-2018
- IEC60947-2:2016+AMD1:2019 Part 2: Circuit-breakers.
- PLN D30.002-2008(Indonesia)Specification for CSP transformers
❶ Specification and Data Sheet
It is three phase circuit breakers, used for three phase transformers. Circuit breaker are installed on the secondary winding of the transformer, are used for over load protection and short circuit protection.
Model Current (A) Rating (KVA) Voltage (V) Signal light Emergency switch (overload) Magnetic protection Resistance (Ω) at 25°C 2 poles Loss (W) at 85°C 2 poles T3P2X313TXXX 626 225 208/120 Yes Yes Yes UΩ 155 T3P2X420TXXX 840 300 208/120 Yes Yes Yes UΩ 270 Note:
- 3P42Txx, “3P" means 3 poles,2X313 means,"TXXX" means trip temperature, for example “T120" means the trip temperature is 120℃ , Temperature can be set from 90 to 130 degree, with +/-10% tolerance,
- And there are +10% tolerance for resistance and loss, emergency tolerance: +/-10%.
❷ Electrical specification for all CSP Oil Type Circuit Breaker
Max Voltage Power Frequency Test
(one minute) 50/60HZLightening Impulse Test Insulation Resistance (5000V) Normal Interrupting Capacity 600V ≥10KV 30KV ≥5000MΩ 11KA~20KA ❸ Interrupting Capacity
Model Current (A) Interrupting Capacity(KA) T3P2X313TXXX 626 20KA T3P2X420TXXX 840 20KA ❹ Trip Temperature and Bi-metal Temperature Rise to Oil
(Trip temperature = Bi-metal trip temperature)
No. Bimetal ID Current (I: A) Bi-metal Ampere Response Factor (J: °C/A²) Bi-metal temperature rise to oil (ΔT: °C) Oil temperature (To: °C) Bi-metal temperature (T: °C) 01 626 626 0.0000610 6.0 To 6.0+To 02 840 840 0.0000720 12.5 To 12.5+To T:Bi-metal temperature(℃ )
ΔT:Bi-metal temperature rise to oil(℃ )
To:oil temperature(℃)
I:Current flow through the Bi-metal trip in(A)
J:Bi-metal Ampere Response Factor in (J:℃ /A²)
ΔT=I²*J
T= ΔT+To
Note: When Bi-metal temperature reaches the trip temperature setting of the breaker,the breaker trip. -
Product Dimension
Key Dimensions Overview
The following drawings show only partial product dimensions.
For the complete set of engineering drawings or full specifications, please contact us at [📪nancywang@ketranele.com].
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Video & Photos
Installation Video
Application
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FAQS
Q1: What is an underground oil-immersed CSP circuit breaker?
A1: It is a low-voltage protection device installed inside underground or sumbersible transformers, used to control and protect the transformer’s secondary circuit.
Q2: What are its main functions?
A2:It automatically disconnects the low-voltage circuit in case of overload or short circuit to protect the transformer and connected equipment.
Q3: What are the advantages of an underground CSP breaker?
A3:The oil-immersed design provides excellent insulation, high reliability, and maintenance-free operation suitable for sealed or underground environments.
Q4: Can it be customized for different transformer types?
A4: Yes, customized models are available for single-phase or three-phase underground transformers with various capacities.
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