High-Performance DC SPD, 275V/255V, 20kA In, 40kA Imax Rating

• Customization: Available
• Type: Power Source Arrester
• Structure: Zinc Oxide Arrester
• Model NO.: TMSPD7
• Installation: Tandem Arrester
• Application: AC/DC System
• Size: Small
• Operation Voltage: Low Voltage
• Shape: Cuboid
• Material: PBT Fireproof
• Certification: ROHS, ISO9001, CE
• Brand: Timelec
• Uc: 275V / 255V
• In: 20kA
• Imax: 40kA
• Up: 1.5kV
• IEC: IEC61643-11
• IP: IP20
• Protection: Class II, T2
• Transport Package: Carton Box
• Specification: 18mm
• Trademark: Timelec, OEM / Private Label brands
• Origin: China
• HS Code: 853620
• Production Capacity: 1000000
• Package Size: 4.60cm * 7.80cm * 3.60cm
• Package Gross Weight: 0.190kg

Product Description

Product Description

SPD Surge Protective Devices are engineered to offer robust defense against transient surge conditions. Major surge events, like lightning strikes, can unleash voltages in the hundreds of thousands, leading to immediate or sporadic equipment malfunctions. However, lightning and utility power irregularities contribute to only 20% of these transient surges. The overwhelming 80% originate internally. While these internal surges may be lower in magnitude, their frequent nature can gradually erode the performance of sensitive electronic devices within a facility.


A power surge represents a short-lived overvoltage episode capable of inflicting damage to electrical devices, often resulting in equipment failure. Surges have the potential to harm and diminish the longevity of:

• Heating and Air Conditioning Systems
• Washers and Dryers
• Water Heaters
• Ranges & Refrigerators
• Lighting
• Entertainment Systems

NEW 2020 National Electrical Code Requirements
All newly constructed and renovated homes must be equipped with Listed and Approved Type 1 or Type 2 Surge Protective Devices, ensuring comprehensive protection.

Type 1:
A permanently connected Surge Protective Device, safeguarding against both external and internal surges. It is versatile enough for installation inside or outside residential premises.

Type 2:
A permanently connected Surge Protective Device installed in proximity to a breaker box. It provides reliable protection against internal and external surges.

Type 3:
Offers additional protection. It is a point-of-use Surge Protective Device and must work alongside Type 1 or Type 2 SPDs to comply with the 2020 code requirements.

For the most comprehensive protection, deploy Type 1, 2, and 3 SPDs together to ensure the highest level of safety.

Product Parameters

Max Continuous Operating Voltage				Ucpv	500VDC	600VDC		1000VDC		1500VDC
Nominal Discharge Current				In	20kA	20kA		20kA		20kA
Max Discharge Current				lmax	40kA	40 kA		40kA		40kA
Protection level				Up	2.8kV	3.0kV		3.5kV		5.5 kV
Rated shortcircuit current				IscCI	100A
lcpv					0.2 mA
Connection mode					paralle
Response Time				tA	25ns
Back up fuse					LT-SSD40
Remotecommunication					With
Remote communication connection					1411:NO,1112:NC
Remote contact rated current					220V/0.5A
Associateddisconnectors
Thermal disconnector					internal
Fuses					Fuses type gG100A
ground fault breaker					None
Mechnicalcharacteristics
Connection					By screw terminals:6-35mm
Terminal Screw Torque					2.5 Nm
RecommendedCable cross Section					≥16mm²
Insertwire length					15mm
Mounting					DIN rail 35mm (EN60715)
Degree of Protection					IP20
Housing					PBT
Flame retardant grade					UL94 V0
Operating temperature					-40ºC~+70ºC
Operatingrelative humidity					5%-95%
Working atmospheric pressure					70kPa~106kPa
Connection					By screw terminals:6-35mm

Installation Instructions

Selection of SPD:
For a power distribution system, choosing the right SPD is crucial. Key characteristics that define the lightning protection system and guide the selection of an SPD for safeguarding an electrical installation in a building include:

• SPD
  • quantity of SPD
  • type
  • The level of exposure is vital to determining the SPD's maximum discharge current, known as Imax.
• Short circuit protection device
  • maximum discharge current Imax;
  • short-circuit current Isc at the point of installation.

Other predefined characteristics for selecting an SPD within an electrical installation include:

• number of poles in SPD;
• voltage protection level Up;
• operating voltage Uc.

This sub-section Design of the electrical installation protection system provides an in-depth analysis of the criteria for selecting a protection system. It takes into account installation characteristics, equipment specifics, and environmental factors.

Location and types of SPD:


Connection of SPD:
Connections of an SPD to the loads should be kept as short as possible to minimize the voltage protection level (installed Up) on the terminals of the protected equipment.

Ensure that the total length of SPD connections to the network and to the earth terminal block remains under 50 cm.

SPD in plastic enclosure SPD in metal enclosure

 

RED: Replace
Once the indicator turns RED, the product requires immediate replacement.