P1200S Teccor Electronics, P1200S Datasheet - Page 144

• Manufacturer Part Number: P1200S
• Description: solid state crowbar devices
• Manufacturer: Teccor Electronics

UL 60950 3rd Edition (formerly UL 1950, 3rd edition)
Figure 4.5 Overvoltage Flowchart
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Notes:
1. Current Limiting — Equipment that has a method for limiting current to an I
2. Current Limiting — Equipment that has a method for limiting current to 1.3 A max steady state
3. 26 AWG Line Cord — Minimum 26 American Wire Gauge (AWG) telecommunications line cord either supplied with the
4. Clause 6.3.3 — The telephone line must be adequately isolated from earth for the operating mode being considered and
5. Fire Enclosure and Spacing — Fire enclosures minimize fire hazards by containing any emission of flame, molten metal,
6. Test Condition 2 is not required for equipment with 1.3 A limiting.
7. Test Conditions 3 and 4 are not required for connections limited to outside cable less than 1,000 m.
equipment or described in the safety instructions
at a voltage of 120 V rms. Refer to Section 6.1.2 of UL 60950.
flaming drops, or glowing particles that could be emitted by the equipment under fault conditions. Fire enclosure
construction is covered in Section 4.4.6 of UL 60950. Spacing applies to parts in the TNV circuits that might ignite under
overvoltage conditions. Spacing requirements mandate that parts be separated from internal materials of flammability
class V-2 or lower, by at least 25 mm of air or a barrier material of flammability class V-1 or better. Parts also should be
separated from openings in the top or sides of the enclosure by at least 25 mm of air or a material barrier.
Connects to Outside Cable
Overvoltage Flowchart
The overvoltage flowchart in Figure 4.5 shows specific guidelines for determining
overvoltage requirements applicable to specific designs.
Enclosure
100 A
Limiting
Limiting
1.3 A
Yes
Yes
Yes
Yes
Fire
2
-S
2
1
Acceptable
No
No
No
No
Fire Enclosure
and Spacings
Pass 6.1.2
Line Cord
26 AWG
Yes
Yes
Yes
4 - 20
No Overvoltage Testing
3
4
5
No
No
No
2
t rating of 100A
SIDACtor
Acceptable
Pass 3, 4
Pass 2
Pass 1
Pass 5
Not
Yes
Yes
Yes
6
®
7
2
s
Data Book and Design Guide
© 2002 Teccor Electronics
No
No
No