HEMP Telephone Line Range
A range of HEMP protection filters for telephone lines for use on HEMP protected installations meeting E1 (short pulse) pci requirements of MIL-STD -188-125-1 & -2. All lines are individually filtered and feature inductive input to offer both good continuous wave EMC performance and superior transient handling performance. All lines feature high-energy varistor transient suppressors at the input end.
Insertion Loss Performance
| Part Number | Number of Lines | Length | Width | Depth | Weight Approx (kg) |
|---|---|---|---|---|---|
| DS33570 | 2 | 300 | 90 | 45 | 2 |
| DS33571 | 4 | 300 | 175 | 45 | 4 |
| DS33572 | 8 | 300 | 340 | 45 | 8 |
| DS33573 | 32 | 547 | 200 | 143 | 17 |
| DS33575 | 100 | 730 | 600 | 250 | 60 |
Rated Voltage
- 295Vac / 125Vdc
Test Voltage
- 1250Vdc each line to case (Prior to fitting transient suppressors)
Rated Current
- 125mA (300mA with slight performance derating)
Insulation Resistance
- >100MΩ (Prior to fitting transient suppressors)
DC Resistance
- >9Ω
Impedance line-earth
- 300Ω
Impedance line-line
- 600Ω
Full Load Operating Temperature Range
- -40ºC to +50ºC
Peak Surge Current
- 6.5kA (8/20s) (E1 only versions)
- 40kA (8/20s) (E1 + E2 versions)
Insertion Loss in 50Ω system
- See graph
Pass Band (300Ω)
- 0 – 4kHz
All MPE installation filters are tested using the test methods defined within the following standards and meet or exceed the relevant performance and/or safety criteria defined within these standards:
- Mil-F-15733
- Mil-Std-220C
- CISPR17:2011/BS EN 55017:2011
- UL1283
- LVD 2014/35/EU
- DEF-STAN 59-411/MIL-STD-461
- RoHS (2011/65/EU) & LVD (2014/35/EU)
- USACE 13.27.54.01
- UFGS 13.49.20.01
- UKCA & CE
- MIL-STD-188-125-1&-2
- DEF STAN 59-188-1&-2
Ordering Code
DS XXXXX / X / X (e.g. DS33575#)
- Filter Part Number
- Suffix C for standard cable entry (for other cable entries, see Installation Details page)