2880 North Plaza Drive • Rapid City, SD 57702
(800) 843-8848 • (605) 348-5580 • FAX (605) 348-5685
www.symcominc.com • email: [email protected]
Specifications
3-Phase Line Voltage ................................190 to 480 VAC
Frequency ..................................................50 or 60 Hz
Low Voltage (% of set point)
•Trip ............................................................90%
•Reset......................................................... 93%
High Voltage (% of set point)
•Trip ............................................................110%
•Reset ..........................................................107%
Voltage Unbalance (NEMA)
•Trip ............................................................6%
•Reset. ........................................................4.5%
Trip Delay Time
•Low Voltage, High Voltage..........................4 seconds
•Unbalance, Phasing Faults ........................2 seconds
Restart Delay Time
•After a Fault or Complete Power Loss ......Adjustable 2 - 300 seconds
Output Contact Rating (DPDT)
....................................................................480 VA @ 240 VAC Pilot Duty
....................................................................10A @240 VAC Gen. Purpose
Transient Protection (Internal) ................IEC 1000-4-5;1995 ± 6kv
Power Consumption..................................5 Watts (Max.)
Weight ........................................................14 oz.
*Note: 50 Hz will increase all delay timers by 20%.
Specifications
•
Operating Points
•
Special Options
6/04
SymCom warrants its microcontroller based products against defects in material or workmanship for a period of
five (5) years from the date of manufacture. All other products manufactured by SymCom shall be warranted
against defects in material and workmanship for a period of two (2) years from the date of manufacture.
For complete information on warranty, liability, terms, returns, and cancellations, please refer to the SymCom
Terms and Conditions of Sale document.
Model 250A
Three Phase
Voltage Monitor
TYPICAL WIRING DIAGRAMS
FOR MODEL 250
M
