2X420 Three Phase 3F Circuit Breaker-Flat [35mm]
- Model: T3P2X420T110
- 110℃
- 120℃
- 130℃
- Curved version available
35mm mounting hole three phase circuit breakers, used for three phase 225-300KVA Pole Mounting high performance transformers. CSP oil immersed low voltage circuit breaker is installed on the secondary winding of the transformer,uses oil for insulation and arc extinction to protect electrical systems from faults.
Low loss, High interrupting capabllity
Resetting Mechanlsm&Emergency Control, Easy for Malntalnance
Complete Certification
Specifications
| Model | T3P2X420T110 |
| Rated Current | 840A |
| For Transformer | 300KVA |
| 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: Do you have American-style 35mm mounting hole three phase CSP circuit breaker for 600kVA transformer?
A1:Yes, we are the source factory for CSP oil-immersed breaker,can provide the protection device for your large distribution transformer.
Q2:How often should an oil-immersed CSP breaker be serviced?
A2:Recommended to perform oil sampling and mechanical inspections every 3 to 5 years. Under normal operating conditions, these CSP breakers require very little maintenance.
Q3:How to install three phase CSP circuit breaker for 600kVA transformer?
A3: We have the video for oil-type CSP circuit breaker in Ketran Youtube website: https://www.youtube.com/@oilimmersedcircuitbreakerf2698
Q4:What is your MOQ ?
A4: For this large oil type distribution transformer circuit breaker, 5 units is the MOQ .
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