ATS with Controller: PC-Class Automatic Transfer Switch, 16A to 630A

Name: EKS5 ATS with Controller - ETEK Electri
SKU: EKS5

The EKS5 ATS with controller is a PC-class automatic transfer switch for 50/60Hz systems, rated 16A to 630A. It transfers loads between two power sources in 70 to 100ms, supports generator control, and complies with IEC 60947-6-1 for dependable critical power.

Request a Quote

Pricing is quoted per order — tell us your quantity and destination and our sales team will respond with a full offer.

ModelEKS5

CategoryAutomatic Transfer Switches, Solar Transfer Switch

AvailabilityIn stock

CE & TUV certified
Worldwide shipping
OEM & ODM support

Product Features of ATS with Controller

This ATS with controller combines a fast PC-class switching mechanism with an intelligent LED/LCD controller:

Fast transfer: minimum converting action time of 70ms (125A/250A frames) and 100ms (400A/630A frames).
Wide current range: 16A to 630A across four shell frames (125, 250, 400, 630) in 2P, 3P and 4P versions.
High breaking capacity: rated limited short-circuit current of 120kA, with circuit breakers or fuses used as SCPD.
Utilisation category: AC-33A (AC-33iA for the 630A frame).
Two or three contact positions: selectable two-sectional or three-sectional contact type (F-menu setting).
Two controller grades: Type A (standard) and Type B (high grade, with split operation, Modbus RS485 remote control and timing start).
Operating modes: self-throwing self-resetting, self-throwing non-self-resetting, and mutually backup modes.
Full voltage and frequency monitoring: phase-failure, under-voltage, over-voltage and lost-voltage detection on A/B/C for both routes; 40Hz–60Hz adjustable frequency detection.
Adjustable settings: under-voltage 161V–196V (default 187V), over-voltage 242V–301V (default 263V), conversion and return delay 0–180s (default 0.5s).
Generator control: built-in dry-contact relay (terminals 501–502) for generator start/stop signals.
Fire-fighting linkage: programmable input/output on three-sectional products; pulse or continuous signal types.
Display and installation: integrated LED digital screen or split LCD screen; integrated or split installation; manual handle with Auto/Manual toggle.

ats with controller

Commercial Applications of ATS with Controller

An ATS with controller such as the EKS5 switches between a common (mains) supply and a standby supply, or a generator, whenever one source becomes abnormal. This keeps essential commercial and industrial loads continuously powered, while the controller handles voltage monitoring, delays and generator start signals automatically.

Applications & Use Cases

Construction: temporary and permanent site power with generator backup.
Industry: production lines and process equipment that cannot tolerate supply interruption.
Finance: banking, trading, and data-processing facilities.
Medical: hospitals and clinics where life-support and critical systems need uninterrupted power.
Communication: telecom exchanges and base stations.
Data centers: mains-to-generator or dual-feeder changeover for servers and cooling.
Airports: terminals, lighting, and control systems.
Rail transit: stations, signalling, and tunnel systems, with fire-fighting linkage.
Sports venues: stadium lighting, broadcast, and safety systems.

Technical Specifications of ATS with Controller

The table below lists the main parameters of the EKS5 ATS with controller by shell frame.

Parameter	125	250	400	630
Poles of switch	2P, 3P, 4P	3P, 4P	3P, 4P	3P, 4P
Rated working current	16, 20, 32, 40, 50, 63, 100, 125A	125, 160, 200, 225, 250A	250, 315, 400A	400, 500, 630A
Category of use	AC-33A	AC-33A	AC-33A	AC-33iA
Rated working frequency	50/60Hz	50/60Hz	50/60Hz	50/60Hz
Rated working voltage	AC220/230V (2P), AC380/400V (3P/4P)	same	same	same
Controlling power supply	AC230V	AC230V	AC230V	AC230V
Rated insulation voltage	800V	800V	800V	800V
Rated impulse withstand voltage	8kV	8kV	8kV	8kV
Rated limited short-circuit current	120kA*	120kA*	120kA*	120kA*
SCPD fuse Ip	12kA	27kA	42kA	59kA
SCPD fuse I²t	0.068×10⁶ A²s	0.3×10⁶ A²s	2.0×10⁶ A²s	3.9×10⁶ A²s
Minimum converting action time	70ms	70ms	100ms	100ms
Contact working positions	II or III	II or III	II or III	II or III
External dimension (L×W×D)	238×140×115mm	292×190×132mm	375×285×195mm	375×285×195mm

Controller Functions: Type A vs Type B

Function	Type A (standard)	Type B (high grade)
Rated control power supply	AC230V 50/60Hz	AC230V 50/60Hz
Auxiliary power supply	DC24V	DC24V
Operation mode	Auto; handle operation	Auto; handle; split operation; communication remote control
Conversion way	Self-throwing self-resetting; self-throwing non-self-resetting	Same
Display	LED digital (integrated) / LCD (split)	Same
Common / backup monitoring	Phase failure, under-, over- and lost-voltage (A, B, C)	Same
Generator control	Yes (one dry-contact relay set)	Yes (one dry-contact relay set)
Fire-fighting linkage	Default unavailable; module can be added	Default unavailable; module can be added
Frequency detection	40Hz–60Hz adjustable	40Hz–60Hz adjustable
Timing start	None	Timing conversion
Conversion / return delay	0.5s default, 0–180s adjustable	0.5s default, 0–180s adjustable
Under-voltage setting	161–196V (default 187V, ±3V, 10V hysteresis)	Same
Over-voltage setting	242–301V (default 263V, ±3V, 10V hysteresis)	Same
Main-power selection	Route I priority (b-3 = 0, default); Route II priority (b-3 = 1)	Same
Communication	None	RS485 Modbus (301 A+, 302 B-, 303 GND)
Installation	Integrated; split	Integrated; split

Display Panel and Keypad

Controller front panel and keypad (SET, ▲, AUTO/MANU)

F-Menu Settings

Press SET, enter password 888 (default), press SET three times to enter the F menu, then use ← / → to browse and ▲ / ▼ to change values. Press AUTO/MANU to save and exit.

Item	Options
F-1 programmable input	0: fire-fighting (default); 1: short-circuit block; 2: remote power cut-off
F-2 programmable output	0: fault alarm; 1: power grid alarm; 2: load unloading; 3: fire-fighting feedback (default); 4: both routes output separately
F-3 input edge	0: pulse (default); 1: high level
Both-route abnormal conversion	0: non-action (default); 1: both separate
Number of contact positions	0: three-sectional; 1: two-sectional
System frequency	0: 50Hz; 1: 60Hz

Operating Modes

Self-throwing self-resetting (default): transfers to the backup source when the common source fails and returns to the common source once it recovers.
Self-throwing non-self-resetting: transfers to the backup source on failure and stays there after the common source recovers; non-action or generator control if the backup fails.
Mutually backup: either source can serve as the common supply; the switch transfers when the active source becomes abnormal.

Dimensions and Wiring of ATS with Controller

Correct sizing and terminal wiring are essential when installing an ATS with controller. The EKS5 offers 125, 250, 400/630 shell frames; the dimensions below are in mm.

ats with controller

Dimension (mm)	125A 4P	125A 3P	125A 2P	250A 4P	250A 3P	400/630A 4P	400/630A 3P
A (external)	238	213	188	292	188†	375	330
B	140	140	140	190	190	285	285
H	115	115	115	132	132	195	195
B2 (external)	75	75	75	109	109	140	140
H3	5	5	5	6	6	12	12
A1 (mounting)	220	195	170	270	235	345	300
B2 (mounting)	115	115	115	170	170	252	252
H1	34	34	34	44	44	56	56
H2	68.5	68.5	68.5	86	86	106	106
E1	124	124	124	165	165	250	250
E	15.5	15.5	15.5	17	17	27	27
D	4.5	4.5	4.5	6.5	6.5	11	11
V	20.5	20.5	20.5	26.5	26.5	40	40
P	25	25	25	35	35	45	45
L	17.5	17.5	17.5	20	20	33	33
L2	18	18	18	36	36	37	37
L3	12.5	12.5	12.5	17.5	17.5	21.5	21.5

Controller Terminal Definitions

Terminals	Function
101–102	Passive signal output: Route I switched-in indicator (contact 5A/250VAC)
201–202	Passive signal output: Route II switched-in indicator (contact 5A/250VAC)
301–303	RS485 Modbus (A+, B-, GND): remote control, switch status and fault code reading
401–402	Programmable passive closed input: fire linkage (default) or prohibition of remote-control conversion
403–404	Programmable passive closed output: fault alarm, power grid alarm, load unloading, fire feedback (default), separate output of Route I/II (0.6A/250VAC, 1.0A/30VDC)
501–502	Generator start/stop dry contact (default); Route II abnormal output when separate-output function is on (0.6A/250VAC, 1.0A/30VDC)
601–602	DC24V auxiliary power input, needed for delayed generator start or remote monitoring when both routes are powerless

Wiring Diagram (3P and 4P)

Both power supplies connect to the Route I (A1 B1 C1 [N1]) and Route II (A2 B2 C2 [N2]) terminals, with the common load output at A B C [N].
Terminals 101–102 and 201–202 give Route I/II status, 301–303 give RS485 A+/B-/GND communication, 401–404 handle fire-fighting input/output and 501–502 provide generator control.
The secondary wiring of the Type A controller is the same as Type B, only without some Type B functional terminals.