Surge Arresters | Surge Protection Devices (Compact) for SSI Protection
Surge Arresters | CRTM150/650
Surge Protection Devices (Compact)
The CRTM150/650 manufactured by PD Devices Ltd is a compact version of their widely-used RTM Series surge protection device, designed to protect equipment connected to AC power supplies from the damaging effects of lightning strikes and voltage surges. These surge arresters help reduce the failure rate of Trackside Functional Modules (TFMs) during lightning storms, improving Solid State Interlock (SSI) performance and extending the service life of the protected equipment.
They are installed on incoming power supplies or tail cables, safeguarding the power supplies within SSI equipment cases and rooms. These advanced protection devices offer an ideal solution for safeguarding signals, points, level crossings, and other critical infrastructure at and between stations.
The CRTM150/650 has been approved with Network Rail Certificate of Acceptance PA05/00602, Issue 7. The product is listed under PADs Catalogue Number 086/047218. It is also approved to the quality standard BS EN ISO 9001, ensuring it meets established quality management requirements.
Surge Protection Devices
Features & Benefits
- Meets the requirements of BS EN 62305 (which replaced BS6651:1999 Annex C in August 2008) and BS EN61643-11/12 – Type II, Class II.
- Protection of equipment connected to AC power supplies against the damaging effects of lightning strikes or voltage surges
- Fitment to 650V SSI AC power supplies in the line side equipment housings
- Two stage (redundant) protection with pre-failure indication
- DIN Rail mountable
- Dual thermal and current overload fusing
- Full protection status indication
- Compact design
- Low “let through” voltage
- Resilient design with long service life
- Simple installation
- Service life of protected equipment extended
- Reduces failure rate of TFMs during lightning storms, improves system performance
- Cost of surge protection devices far outweighs safety issues, downtime and equipment replacement
CRTM150/650 Dimensions
CRTM150/650 Compact Series
Specification
| Part Code Network Rail Code |
CRTM150/650 PADS No: 086/047218 |
| Description | 75kA Single Phase 650V MOV Module |
| Voltage Rating | 650V rms |
| Operating Voltage Range: | 650-800V rms |
| Maximum Current Rating | Unlimited (Parallel Connection) 25A (‘V’ Connected |
| Maximum Surge Current Imax (8/20 μs): | 75kA |
| Nominal Surge Current, In (8/20 μs): | 40kA |
| Let-through Voltage (Tested at In) | <3.0kV |
| Let-through Voltage (Tested at 6kA 8/20μs) | <1.9kV |
| Terminals: | 6sqmm Termination required. |
| Operating Temperature: | -40ºc to +70ºc |
| Light Emitting Diodes: | 2 Green – Full Protection 1 Green – Reserve Protection No Green – No Protection, or No Power |
| Case Material: | Light Grey polycarbonate, UL94 V-0 |
| Type according to BS EN 61643-11 | SPD Type II, Class II |
| Location according to BS EN 62305 | LPZ 1 – 2 |
| Dimensions: | 95mm L x 36mm W x 58 mm H |
| Mass: | 200g |
| Response Time: | < 10 ns |
| Torque – Main terminals | 0.5 N·m |
AN Wallis & PD Devices LTD
Overvoltage Protection for Power Generation Equipment
SPD | Surge Protection Devices | Earthing & Lightning Protection
AN Wallis has fully acquired PD Devices Ltd, making it a 100% subsidiary of the Wallis Group.
PD Devices Ltd specialises in the design and manufacture of Earthing, Lightning Protection & Surge Protection Systems.
The PD Devices range of Surge Protection Devices (SPD’s) protect against transient over-voltages and increase the reliability of Low & High Voltage electrical equipment systems utilising their Metal Oxide Varistor (MOV) technology: this includes standard Mains Power, Data, Photovoltaic Protection & Equipotential Bonding applications.
Specialist application Surge Protection Devices include: Solid State Interlocking (SSI) | Airfield Lighting Circuits | Rail Trackside (internal linked)
AN Wallis, based in the UK are a leading manufacturer of Earthing & Lightning Protection Products, using high conductivity copper to BS EN 13601 – their earthing products are installed to protect buildings, overhead lines and low/medium/high voltage substations (LV-MV-HV) against potentially catastrophic damage that can be caused by a lightning strike resulting in short circuiting.
The Wallis product range includes copper earth rods (solid copper, copper bond and stainless steel types), earth bars, copper tape, earth clamps and aluminium tapes.
Surge Protection Devices (Compact) for SSI Protection CRTM150 650 – Data SheetDownload
