MCB CoS
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Pressfit’s SFT1 MCB Changeover Switch (COS) enables us to switch the load between two power supplies. In most cases, the COS is used to switch to a backup line when the main line needs to be taken offline for repair and maintenance. It is widely used in industries and in domestic locations where continuity of supply is necessary. It finds a lot of use in individual bungalows due to the same reason.
Changeover switches, in principle, disconnect switches independently based on manual operation, and can make, carrying, and breaking currents under normal circuit conditions. The COS has 3 positions – I-O-II with the center line being the off. The SFT1 COS comes in 2 types – DP and FP – for single and three phase applications, just like other circuit breakers.
DP MCB COS
FP MCB COS
EXCEPTIONAL FEATURES
Single Frame for Complete Range
Double Break Contact Mechanism
Easy Snap-On DIN Rail Mounting
Maximum Terminal Capacity of 35 sq. mm
INSTALLATION
1. Switch off MCB and disconnect the power supply.
2. Mount COS over DIN rail with snap at bottom.
3. Check operation of knob position before connecting cables
4. When Knob position is I
a. Top indicator is RED, Bottom indicator is GREEN
b. Load is connected through power supply I
5. When Knob position is II
a. Top indicator is GREEN, Bottom indicator is RED
b. Load is connected through power supply II
6. When Knob is at MID position
a. Both indicators show GREEN & it is a No Load / Off position
7. Connect cables at incoming & outgoing terminals.
8. Select power supply (I or II) for Load.
9. Switch the MCB on.
Technical Specifications:
Reference Standard | IS/IEC 60947-3 |
Current Rating (In) | 25A, 40A, 63A |
Poles | DP, FP |
Rated Voltage (Ue) | 240/415V AC |
Rated Frequency (f) | 50 Hz |
Rated Insulation Voltage (Ui) | 660V AC |
Rated Impulse Voltage (Uimp) | 4kV |
Dielectric Strength | 2500V for 1 minute |
Utilization Category | AC22A |
Protection Class | IP20 |
Ambient Temperature | -5° to 50° C |
Mounting | Clip on DIN Rail (35mm x 7.5mm) |