TII EMC-240B Surge Suppressors
Fast Response Time
Protection Available Indicators
Automatic Instant Recovery
The tii EMC-240B Surge Suppressors are designed to protect the remote terminal of a digital loop carrier or similar electronic equipment. There are two models available with top or bottom wire entry that can be used on either 240-volt single phase or 120 volt service.
KEY PRODUCT BENEFITS
Can be mounted on the AC service by conduit, junction box, or power panel utilizing a standard inch threaded hole.
All models are available with fuses and failure indicators
Green colored LED indicators show that protection is available and product is functioning properly.
The EMC-240B features totally solid state technology for reliability and quick response to surges. Two advanced, metal oxide varistors (MOV) are the primary protective elements. These MOVs are each capable of 40,000 amps of surge current. The protection components are designed to failshort and are fused. After a surge, the suppressor automatically recovers and is ready for the next surge. In a rare event of MOV failure, the fuse opens and the indicator LED extinguishes.
Listed to UL 1449
Model No. Description
EMC-240B AC Surge Suppressor with Fuses and Failure Indicator, Top Wire En try, 18" Wire Leads
Standard Package: 5 Pieces
Weight: 3 lbs. each
S P E C I F I C A T I O N S
Response Time <5 Nanoseconds
Maximum Surge Current 40,000 Amps Per Line * **
Maximum Energy Absorption 2ms 360 Joules per Line
Initial Clamp Voltage (L-N) 240 Volts Nominal
Clamp Voltage @ 300A (L-N) 395 Volts Nominal
Clamp Voltage @ 1,000A (L-N) 450 Volts Nominal
Clamp Voltage @ 5,000A (L-N) 530 Volts Nominal
Clamp Voltage @ 10,000A (L-N) 600 Volts Nominal
Max Allowable Voltage (L-N) 150V rms 50-60Hz
Max Allowable Voltage (L-L) 275V rms 50-60 Hz
Failure Mode Failsafe (short) and Fused
Failure Indication LED Indicators
Surge Life @ 500A >10,000 Occurrences
Surge Life @ 2,000A >1,000 Occurrences
Surge Life @ 5,000A >300 Occurrences
Surge Life @ 10,000A >50 Occurrences
Operating Temperatures -40° – +85°C
* Maximum surge current capability may be higher when both black wires are tied together in 120-volt service application as shown in circuit below.
** Current rating is limited by fuse in series.
Measurements are taken at the component connections. Response time and voltages at the equipment will be greater due to the inductance of the connecting wire to the EMC-240B.
All current test waveforms are 8 x 20 µs.
Dimensions are in Inches
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