Download Print this page

Upstream Over-Current Protection Device; Conductor Routing; Conductor Sizing - Total Protection Solutions ServiceTrack ST 080 Operating Instructions Manual

Hide thumbs

Advertisement

3. Upstream Over-Current Protection Device

The ServiceTrack ST models ST120 up to and including ST400 are listed as a Type 1 SPD per UL 1449 3rd Edition,
suitable for use in both Type 1 and Type 2 SPD applications. This means that the ServiceTrack ST can be installed
on the line or load side of the main service disconnect. ServiceTrack ST must be connected in parallel to the electrical system.
• Optional Component-Level Fusing Units: Model Numbers With "-L" Suffix
(Example model number: TK-ST240-3Y208-FL)
The ServiceTrack ST models ST120 up to and including ST400 with the "-L" suffix are listed as Type 1 SPDs
making them suitable for use in Type 1 and Type 2 SPD applications. These units DO NOT require an upstream
over-current protection device and can be connected to the electrical distribution system bus.
They have built-in over-current fusing rated at 200,000 rms symmetrical ampere at 600VAC
• Standard ServiceTrack ST Units: Model Numbers With "-N" Suffix - Type 2 SPD
(Example model number: TK-ST080-3Y208-NF)
These units MUST be connected to an upstream over-current protective device (circuit breaker, fuse or fused
switch). The ratings for the upstream over-current protective device are as follows:
CAUTION: Do not splice ServiceTrack ST conductors within the unit's enclosure or Manufacturer's warranty
!
will be void. ServiceTrack ST's performance will be limited severely if the conductors are (a) too long, (b) are
of too small a wire gauge, (c) have too many bends or (d) have sharp bends.

4. Conductor Routing

The factors listed above should be addressed during the design of an installation to reserve a suitable place for ServiceTrack ST
next to its point of connection to the electrical system. The selected mounting location should allow for the shortest possible
conductor runs and a direct route with a minimum of bends. If bends are required, they should be sweeping bends. Do not
make sharp 90° bends for appearance purposes because they will severely decrease the effectiveness of ServiceTrack ST.
Braiding or twisting conductors together using tie-wraps or electrical tape increases the protection performance of the device.
One or two twists or braids of all conductors per foot and securely tie-wrap when conductor lengths must exceed 12".

5. Conductor Sizing

Total Protection Solutions recommends installing ServiceTrack ST by using the following conductor size for phase, ground
and neutral connections. Braiding or twisting conductors together using tie-wraps or electrical tape increases the protection
performance of the device. One or two twists or braids of all conductors per foot and securely tie-wrap when conductor lengths
must exceed 12".
Example of a SPD model number: TK-ST240-3Y208-FL
PRODUCT L BEL
DESIGN TION
TK-ST080-xxxxx
TK-ST120-xxxxx
TK-ST160-xxxxx
TK-ST200-xxxxx
TK-ST240-xxxxx
TK-ST300-xxxxx
TK-ST400-xxxxx
1
80kA rated units are shipped with #10AWG leads. Note: Leads should be shortened during installation in order to minimize
conductor length.
For direct bus connection maximum wire size is recommended. Otherwise match wire size to the rating of the disconnect breaker.
2
®
sERVICEtRaCk st
InstallatIon, opERatIon and MaIntEnanCE Manual
For 80kA, 120kA and 160kA units:
Class J or equivalent fused disconnect or circuit breaker rated at 60 amperes maximum/
600 volts maximum.
SURGE CURRENT
C P BILITY
80kA/phase
1
120kA/phase
2
160kA/phase
2
200kA/phase
2
240kA/phase
2
300kA/phase
2
400kA/phase
2
RECOMMENDED
M XIMUM
#10 AWG
#10 AWG
#6 AWG
#6 AWG
#6 AWG
#6 AWG
#2 AWG
#2 AWG
#2 AWG
#2 AWG
#2 AWG
#2 AWG
#2 AWG
#2 AWG
CONDUCTOR SIZE
MINIMUM
#10 AWG
#10 AWG
#10 AWG
#10 AWG
#10 AWG
#10 AWG
#10 AWG
5

Advertisement

loading