Features:
Features:
16
Kilovac EV250-1A & 1B - 400 Amps ("Czonka II EVX")
Make & Break Load Switching
PRODUCT SPECIFICATIONS COIL DATA***
CONTACT RATINGS*
* For circuit conditions and actual data refer to the EV250 hot switch study. Since each application is unique, user is encouraged to verify rating in
actual application.
Hydrogen dielectric for power switching high
current loads
400 A carry, 2,500 A interrupt @ 320 Vdc
Ideal for circuit protection, control, battery
switching, and main power safety disconnect
Versatile power, voltage, and current
operating range: 28-1800Vdc tested
Low-cost compact version for volume
production applications. Requires external
coil economizer (PWM or lower hold voltage)
Patented "hammer effect" mechanism breaks
light contact welds
Patented "Super-sealed" environment
chamber uniquely protects ALL moving parts
Can operate in harsh environments
Moving contact rotates to provide fresh
contact surface for low contact resistance
and low power comsumption
Sealed control connector. Mating connector
with flying leads P/N 2005 available, see
page 59
Logic control enabled by external economizer
P/N 9913
High temperature (135oC) model with 10 inch
flying leads available (-4A call factory for
sales drawing)
Bi-directional power switching
Fast operate and release time
28-1800 Vdc
Sample Part No. EV250-1 A
Coil Voltage
A = 12 Vdc, Nominal
B = 24 Vdc, Nominal
PART NUMBER SELECTION
For detailed specifications and recommendations,
refer to the EV250-1A & B sales drawings.
Parameter
Voltage* (nominal )
Pickup (close), max.
Continuous Hold, max/min **
Dropout (open), min.
Coil Resistance
@ 25oC, +/- 10%
Coil Energy, max.
Coil Clamping
Units
Vdc
Ohms
J
EV250-1A
12
8.3
5.1/3.8
0.88 - 3.3
3
0.2
3 x nom.
EV250-1B
24
16.6
10.2/7.6
2.4 - 6.6
12
0.2
3 x nom.
* Refer to Page 19 for actual mix of precharge and break currents used on each cycle.
* Do not apply continously. Requires external coil economizer. Other special coil
voltages available upon request.
* * At maximum continuous current and maximum ambient temperature. Hold
voltage must be maintained within the limits specified to keep contacts closed
and to prevent coil overheating.
* * * Do not use a free wheeling diode or capacitor across the coil.
1
1 0
1 0 0
1 ,0 0 0
1 0 ,0 0 0
1 0 0 ,0 0 0
1 1 0 1 0 0 1 ,0 0 0 1 0 ,0 0 0 1 0 0 ,0 0 0
28Vdc
Life C ycles
Switching C urrent
270Vdc
400Vdc
600Vdc
900Vdc
1800Vdc
R eg io n o f
C ontact
Levitation .
O peration
P ro h ibited
Mom en ta ry C arry
R eg io n
400A 9000A
120Vdc
Part Number
Contact Arrangement ..........................................................
Contact Form ........................................................................
Continuous Current Carry, Max. ........................................
6.5 Minutes ....................................................................
Break Current @ 320 Vdc ...................................................
Contact Resistance, Max. ...................................................
Contact Resistance, Typ. ....................................................
Dielectric at Sea Level (leakage < 1mA) ............................
Shock, 11 ms 1/2 Sine (peak), operating .........................
Vibration, Sinusoidal (80-2000 Hz, peak) .........................
Operating Ambient Temperature Range ............................
Load Life, @320 Vdc, 95% Weibull* .................................
Operate Time, 25oC ..............................................................
Close (includes bounce) Typ. ......................................
Bounce (after close only), Max. ..................................
Open (includes arcing), Max. ......................................
Insulation Resistance @ 500 Vdc, Min. ............................
Weight, Nominal ..................................................................
oo
UNIT EV250-1A EV250-1B
SPST-NO SPST-NO
X X
A 400 400
A 500 500
A 2,500 2,500
ohms 0.0003 0.0003
ohms 0.0001 - 0.0002 0.0001 - 0.0002
Vrms 2,200 2,200
G's Peak 30 30
G's 20 20
C -40 to +85 -40 to +85
cycles See Page 19 See Page 19
ms 30 30
ms 5 5
ms 15 15
Mohm 100 100
pound (kg) 1.54 (0.7) 1.54 (0.7)
Tyco Electronics / www.tycoelectronics.com / Factory Direct Technical Support: 800-253-4560, ext. 2023 (U.S., Canada, Mexico) or 805-220-2020, ext. 2023 (International)
Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
Features:
Features:
19 CII Technologies / P.O. Box 4422 / Santa Barbara, CA 93140 / ph 805.684.4560 / fax 805.684.9679 / e-mail info@kilovac.com / website www.ciitech.com
LIFE RATINGS AND QUALIFICATION TEST PLAN
Normal Operations Abnormal Operations
Test # 1 2 3 4
Current reference graph and -250 A 2500 A
Voltage test circuit diagram (sht. 8) 320 V 320 V
Load Type Capacitive Capacitive Resistive Resistive
% P re Charge 90% 70% N/A N/A
Switch Mode make
only
make
only
make/ break break only
Sequence
1 10K cycles 10 cycles 2 2
2 10K 10 2
3 10K 10 2
4 10K 10 2 2
5 10K 10 2
Etc. Continue Cycling to Relay Failure
The testing objective is to verify proper relay function for a g iven number of consecutive and cumulative
cycles under both normal and abnormal conditions in a variety of load switching applications. The life
rating o f 40K cycles minimum was calculated with 95% Weibull reliability.
CURRENT vs TIME
CONTACTS CLOSED INTO 70% AND 90% CAPACITOR PRE CHARGE
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
750
0 1 2 3 4 5 6 7 8
EV250 Contact Ratings
(1) Resistive load includes inductance L = 25 uH. Load @ 2500 A tested @ 200 uH.
(2) Conductor: 2 each of Copper 54 mm2 (AWG 0) required for > 250 A carry.
1 Copper (AWG 0) conductor recommneded for 250 A
(3) Life based on projected Weibull Life with 95% Reliability
£
Electrical Data (Over Temperature Range - Max. Terminal Temp. = 200oC)
Make/Break Life for Capacitive & Resistive Loads at 320 Vdc (1) (2)
@ 90% capacitive pre-charge Cycles 50,000
@ 70% capacitive pre-charge Cycles 50
@ -250 A (2 consecutive, reverse polarity) (1) Cycles 10
@ 3300 A (break only, 2 consecutive) (1) Cycles 4
Mechanical Life Cycles 100,000
