ABB CPS2400U, Product Manual

Page: 21 / 57

Page 21
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Inspect the Network
Check and Mark Wiring Compliance
The system is classified as an A2 circuit tested according to GR - 1089 - CORE Issue 3. As such, each
location in the network where the output is available to be touched must be protected and marked as
an A2 voltage.
Step Action
1.
Is accessibility to the circuit throughout the network consistent with A2 requirements?
Table 7 - 1 Accessibility to Continuous Class - A Voltages
2. Is the 5 - pin protector marked as a special circuit?
3.
primary protector?
Voltage Class General Public Employees Crafts persons
A1 Restricted Access Exposed Exposed
A2 Inaccessible Restricted Access Exposed
A3 Inaccessible Inaccessible
Restricted Access
(Exceptions)
Verify UL Installation Compliance
•
This verification is required at the time of installation to meet UL60950 - 21.
•
Perform this verification before power is distributed in the network.
Normally the final step is performed by closing the circuit using a 5 - pin protector after DC power is
applied to the system.
Step Action
Recognize that the Remote Feed Telecommunication Voltage limited (RFT - V) circuit is voltage limited to
- 190V from ground.
Is the total capacitance to ground on each line of the circuit less than 10 μ F?
The QS982 introduces 4.4 μ F. The remote electronics and line must introduce less than 5.6 μ F of capacitance. .
Is the total capacitance line to line of the circuit less than 40 μ F?
The QS982 introduces 2.2 μ F. The remote electronics and line must introduce less than 37.2 μ F of
m
Is the remote equipment also a RFT - V voltage limited circuit?
Both ends of the circuit must be designed to the same standard. This must be verified before the equipment is
connected together.
Is the voltage rating of the Network Wiring sufficient to support 190V to ground?
Is the wire between the converters and primary protectors minimum 26AWG 200V rated?
Is the chassis of the system bonded to ground?
Verify by both observation and measurement before powering the system. Measurement from the exterior of
the Converter Shelf to the cabinet ground bus should indicate continuity as determined vi a meter providing an
audible beep or the standard method of continuity verification used in the network.
Many network providers use a maximum value of 10 ohms.