Load

On Load Changeover Switches

(with & without Fuses)

Salient Features

Function

Accessories

These changeover switches are used to control &

disconnect any kind of circuit-disconnection feeders both

resistive & inductive loads

By means of manual operation, changeover performs

circuit switching between two independent circuits -I & II

Auxillary contact (early break type) 1NO + 1NC or

2NO + 2NC is available

Key & Castle lock facility

Modular design in 3 & 4 pole (63A ~3150A), suitable for

utilization category AC-23A

Easy maintenance as each pole can be replaced easily

due to modular construction, saving cost of entire Switch

in case of single pole being burnt or damaged.

Available in open execution & in sheet steel enclosure.

Provision for defeating door interlock

Complies with the latest requirements of IEC-60947-1&3 /

13947-1&3 standards.

Unique self cleaning contact construction with special

knife type (200A~1800A), double break switching

contacts (63~160A & 1000~1800A) & single break

(200A~800A). Positive opening operation, with quick

make - break and effective arc splitting plates guarantee

reliability and long electrical life of the Switch.

Excellent tracking resistance of isolation material in switch

frame prevents flashover between phases even in the

most trying & difficult locations.

Adjustable telescopic shaft

Compact construction

Window for visual contact inspection

Suitable for capacitor switching and as a Main switch

Handle with in-built padlockable facility in-off position

Individual phase barrier can be incorporated without

tools, between two terminals. Fully protected frame for

safe operation in case of (200A~800A)

Compact On-Load By Pass Switch

Salient Features

Range 63A ~ 1800A, 4 Pole.

Complies with the latest requirement of IEC 60947-1&3

and IS/13947-1&3

By-pass Switch is designed to customers specific need

in IT industries and sites where UPS and Servo stabilizer

provides main source of supply

All other features are same as of On Load Changeover

Switches

AC23A utilization ratings available.

C&S Compact On-Load By-pass switch is operated

manually with single handle comfortably. It provides three

stable positions :

O Loads are open circuited

I Loads are connected to the stabilized

supply

II Loads are connected to the normal supply

Auxiliary contact (early break type) 1NO +1NC or 2NO+2NC

When By-pass switch is selected at position ‘O’ all the

contacts of isolator are open circuited and provide total

isolation.

In position ‘I’ both isolator I & III are closed and stabilized

supply is connected to the load. At position II only isolator II is

closed & isolators I & II are open thus bypassing UPS &

connecting normal supply directly to load

Operation

Auxiliary Contacts

Single Line Diagram

Position Operation

Regulator

Load Load Load

SW I SW I

SW I

SW III

SW III SW III

SW IISW IISW II

Regulator Regulator

C&S pioneered the concept of positive isolation in case of

welding of contacts. In the event of extremely high current

leading to welding of contacts, the handle will not turn

beyond 45 from the ON position, clearly indicates that the

supply is ON and contacts get welded.

Convenience of easy contacts visibility, permits contact

inspection, without removing the switch from installation,

thus saving down time.

Self extinguishing fibre glass re-inforced insulating body of

poles has very high tracking index. Large gap between fixed

and moving contacts in OFF position, make them suitable

for isolation function.

Door interlocking prevents opening in the ON position,

guarding the operator against any accidental mishap. As a

standard upto 3 padlocks are provided in the OFF position to

prevent closing the circuit during maintenance work. They

can also be provided in the ON position. Using a suitable

gasket alongwith handle enhances ingress protection

level to IP 54.

III

UPS/Servo

Stabilizer

Normal Supply

(EB/Generator)

LOAD

Safety Built-inSwitch Construction

OFF

Max. 45

Introduction

02 03

Visible Contacts