High Voltage Circuit Breaker 1140V AC 800A 50kA Isolation

Name: High Voltage Circuit Breaker 1140V - ETEK Electri
SKU: EKM16_AC_MCCB

Engineered for highly demanding alternating current networks, this High Voltage Circuit Breaker delivers uncompromising electrical isolation up to 1140V AC. The EKM16_AC_MCCB series operates as an exceptionally robust mccb circuit breaker, effectively managing continuous loads from 63A to 800A to secure the output loading of solar string inverters and massive commercial AC combiner boxes.

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ModelEKM16_AC_MCCB

CategoryMolded Case Circuit Breakers, Circuit Breakers

AvailabilityIn stock

CE & TUV certified
Worldwide shipping
OEM & ODM support

Product Features of the High Voltage Circuit Breaker

Constructed for rigorous electrical environments, this High Voltage Circuit Breaker pairs an instantaneous electromagnetic release with a highly responsive thermal release mechanism.

Extreme High-Voltage Capacity: Operates flawlessly at elevated voltages up to 1140V AC, decisively isolating severe faults with a maximum 50kA ultimate short-circuit breaking capacity (Icu).
Zero Arc Technology: Engineered with a specialized arcing distance of 0mm (when equipped with the integrated arcing cover) to safely extinguish high-voltage AC arcs within compact enclosures.
Extended Mechanical Lifecycle: Built for massive commercial switching operations, delivering an exceptional mechanical life of up to 20,000 cycles without degradation.
Advanced Isolation Function: Fully integrates reliable circuit isolation capabilities, distinctly marked on the faceplate for instant engineering verification.
Flexible Environmental Tolerance: Operates reliably in ambient temperatures ranging from -45°C to +70°C and at extreme elevations up to 2000m without derating.

Applications for the High Voltage Circuit Breaker

Deploying the EKM16_AC_MCCB secures vital high-capacity AC nodes, acting as a highly dependable mccb circuit breaker for utility-scale electrical infrastructures.

Applications & Use Cases

Utility-Scale Solar Arrays: Functions as the primary mccb circuit breaker to safely aggregate and isolate the output loading of massive AC string inverters.
Photovoltaic AC Combiner Boxes: Secures the internal loading capacity of complex AC combiner networks against severe electrical overloads and short circuits.
Industrial Heavy Machinery: Protects specialized manufacturing equipment operating on massive alternating currents, ensuring flawless zero-interruption fault isolation.

Technical Specifications with the High Voltage Circuit Breaker

Evaluate the exact voltage ratings and massive breaking capacities below to seamlessly integrate this High Voltage Circuit Breaker into your heavy-duty AC distribution panels.

General & Electrical Data (IEC 60947-2)

Model	EKM16-250H	EKM16-315H	EKM16-400H	EKM16-630H	EKM16-800H
Rated frame current Inm (A)	250	315	400	630	800
Number of poles	3P
Rated current In (A)	63 – 315		250 – 400	400 – 630	630 – 800
Rated operational voltage Ue (V)	AC800, AC1000, AC1140
Rated insulation voltage Ui (V)	1150		1250
Rated impulse withstand Uimp (kV)	12
Rated ultimate short-circuit breaking capacity Icu (kA)
AC800	50		50
AC1000	20		20
AC1140	15		15
Rated service short-circuit breaking capacity Ics (kA)
AC800	35		37.5
AC1000	15		15
AC1140	15		15
Utilization category	Cat.A
Mechanical / Electrical life	20,000 Cycles / 1,500 Cycles
Arcing distance (mm)	0

Quick Selection Table

Utilize the configuration codes below to precisely specify the EKM16 series mccb breaker for your exact commercial power needs.

EKM16	630	H	Z	3	300	630
↓	↓	↓	↓	↓	↓	↓	↓
Product code	Frame current	High voltage	Operation mode	Poles	Accessory code	Rated current (A)	Installation method
EKM16 Series MCCB	250, 315, 400,630, 800	High voltage	None: Direct operation P: Electrically operation Z: Turning handle	3P	See accessory table	63,80,100,125,140, 160,180,200,225,250, 280,300,315,400,500, 630,700,800	None: front connection Z1: rear connection Z3Q: Plug-in front connection Z3H: Plug-in rear connection

Selection of Cross-sectional Areas of Connecting Busbars and Cables

Ensure optimal power transmission and prevent thermal degradation by utilizing the correct copper busbar or cable cross-sections.

Selection of Busbars
Rated current (A)	63	80	100	125	160	180-225	250	280-300	315-400
Cross-sectional area (mm²)	16	25	35	50	70	95	120	185	240 (315-400A)

Selection of Cable
Rated current (A)	Cross-sectional areas of cables		Copper busbar size
Rated current (A)	Quantity	Sectional area (mm²)	Quantity	Sectional area (mm)
500	2	150	2	30 × 5
630	2	185	2	30 × 8
700	2	240	2	50 × 5
800	2	240	2	50 × 5

Product Protection Requirements for Power Distribution

Rated current (A)	Thermal release (ambient temperature +40°C)		Tripping current of electromagnetic release
Rated current (A)	Non-operation time at 1.05 times rated current (cold state) in hours	Operation time at 1.3 times rated current (hot state) in hours	Tripping current of electromagnetic release
63	≥1	≤1	10 In ± 20%
63 < In ≤ 800	≥2	≤2	10 In ± 20%

Power Loss Table

Model	Current (A)	Total Power Loss for Three-phase/Four-phase (W)
Model	Current (A)	Front panel wiring	Backboard wiring	Plug in front wiring	Plug in Backboard wiring
EKM16-250H	250	62	63.5	66	70
EKM16-315H	315	67	73	75	78
EKM16-400H	400	115	117	120	125
EKM16-630H	630	187	192	190	210
EKM16-800H	800	260	262	265	290

Applicable Working Environment and Compensation Coefficient

Model	Ambient Temperature
Model	+40°C	+45°C	+50°C	+55°C	+60°C	+65°C	+70°C
EKM16-250H	1.0In	0.983In	0.965In	0.94In	0.924In	0.904In	0.882In
EKM16-315H	1.0In	0.982In	0.962In	0.942In	0.922In	0.901In	0.880In
EKM16-400H	1.0In	0.980In	0.960In	0.940In	0.918In	0.898In	0.877In
EKM16-630H	1.0In	0.979In	0.958In	0.937In	0.912In	0.895In	0.872In
EKM16-800H	1.0In	0.977In	0.956In	0.931In	0.905In	0.893In	0.868In

Derating Coefficient of Technical Parameters Based On Altitude

Altitude (M)	2000	2500	3000	3500	4000	4500	5000
Max operating current coeff.	1	1	0.98	0.97	0.95	0.94	0.93
Max operating voltage (V)	1140 1000 800	1140 1000 800	1060 900 720	1000 850 670	980 810 630	940 770 600	900 730 560
Power frequency withstand (V)	3000	3000	2650	2500	2300	2150	2000
Insulation voltage (V)	1150 1250	1150 1250	1040 1140	980 1080	935 1035	890 990	845 945

Tripping Characteristic Curve

EKM16-250H/315H Tripping Characteristic Curve

EKM16-400H Tripping Characteristic Curve

EKM16-630H/800H Tripping Characteristic Curve

Dimensions and Wiring of the High Voltage Circuit Breaker

Verify the exact modular footprints and heavy-duty terminal clearance below to guarantee perfect panel fitment for this High Voltage Circuit Breaker.

Overall Dimensions (mm)

EKM16-250H/315H Overall Dimensions

EKM16-400H Overall Dimensions

EKM16-630H/800H Overall Dimensions

Mounting Dimension of Plug-in Rear Connection (mm)

EKM16-250H/315H Mounting Dimension of Plug-in Rear Connection

EKM16-400H Mounting Dimension of Plug-in Rear Connection

EKM16-630H/800H Mounting Dimension of Plug-in Rear Connection

Mounting Dimension

EKM16 Mounting Dimension

Model	Dimension (mm)
Model	A	B	C	D	E	F	G	H	I	J	n-Ød
EKM16-250H	30	30	30	30	188	13	80	280	94	53	2-Ø4.5
EKM16-315H	30	30	30	30	188	13	80	280	94	53	2-Ø4.5
EKM16-400H	30	30	30	30	153.5	13	50	307	118	53	2-Ø4.5
EKM16-630H	30	30	30	30	185	13	50	320	118	60	2-Ø4.5
EKM16-800H	30	30	30	30	185	13	50	320	118	60	2-Ø4.5

Instruction: When using 1000V and 1140V, terminal covers should be installed on terminals 1, 3, and 5 of circuit breakers according to the diagram, and phase partition boards should be installed on terminals 2, 4, and 6 of circuit breakers. And install an insulation board between the circuit breaker and the metal mounting plate.