CXS4P-100 Mini ATS Automatic Transfer Switch

Q: What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

Q: How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Q: Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Q: Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.

About the CXS4P-100 Mini ATS Automatic Transfer Switch

The CXS4P-100 Mini ATS Automatic Transfer Switch is part of the ELEHPD Dual Power AST range. CXS4P-100 Mini ATS Automatic Transfer Switch from the ELEHPD Dual Power AST range. ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Full catalogue description: CXS4P-100 Mini ATS 4P Automatic Transfer Switch Electrical Selector Switches Dual Power Switch Din Rail Type

Typical applications

Motor control centres and pump or fan starters
Machine building, conveyors, packaging and CNC equipment
HVAC control panels and building automation
Water treatment, irrigation and pumping stations
Panel retrofits replacing electromechanical control gear

How to specify the right Dual Power AST

Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
Confirm the auxiliary contact count needed for the control and indication circuit
Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)

Specifications

CXS4P-100 Mini ATS 4P Automatic Transfer Switch Electrical Selector Switches Dual Power Switch Din Rail Type

Technical Data

ITEM NO.	CXS
Rated current Ie(A)	16A, 20A, 25A, 32A, 40A, 50A, 63A,100A
Installation	Din rail
Rated insulation voltage Ui (V)	AC690, 50HZ
Rated working voltage Ue (V)	AC400, 50HZ
Rated impulse withstand voltage (KV )	8KV
Poles	2P 3P 4P
Weight (KG)	0.7 0.85 1
Connecting and breaking	6.0Ie 1.05Ue cosØ=0.50±0.05, 50 times
Operating performance	2.0Ie 1.05Ue cosØ=0.80±0.05, 6000 times
Rated limited short-circuit current Iq	50KA
SCPD (FUSES )	RT16-00-63A
Control circuit	Rated supply voltage Us: AC220V, 50HZ. Working condition:85% Us~110% Us
Ancillary circuit	Two isolated relays, each relay with 2 groups of passive switch contact. Contact capacity: AC220 50Hz, Ie=5A
Switching time	<50ms
Action time	<50ms

Frequently asked questions about the CXS4P-100 Mini ATS Automatic Transfer Switch

What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.