Emerson Liebert PPC 15-30 kVA, Technical Data Manual

Additional Features for All Systems

7

Spike Suppression Module

The spike suppression module consists of AC filter 

capacitors and dynamic peak limiting devices with a 

response time of less than 1 nanosecond. Normal mode 

high frequency noise is attenuated, while high-speed, 

high-energy transients are limited to a safe level.

Transformerless System 

(Not Available on Top Exit Units)

The Precision Power Center can be supplied without 

a transformer for use with separate power condition-

ing systems. If step-down and isolation are not neces-

sary, transformerless systems provide the packaged 

power system advantages of security, distribution, 

monitoring, and upgrade flexibility.

Remote Emergency Power Off (REPO) Switch

Pressing the REPO push but-

ton activates the shunt trip 

mechanism of the main input 

circuit breaker, shutting down 

the system.
The illuminated and fully 

guarded REPO button is 

mounted in a wall box. The 

assembly includes 50 feet 

(15.2m) of 3-conductor cable for 

wiring to the unit. Additional 

lengths of cable are available.

Floor Pedestals

In rooms without a raised 

floor, the floor pedestals pro-

vide space for the bottom 

entrance/exit of cables in Pre-

cision Power Center. The 

height of the floor pedestals is 

customer-specified. Standard 

floor pedestal height range is 

adjustable from 8.6 to 13.25 in. (218 to 336 mm). 

Other available ranges: 6 to 8.5 in. (152 to 216 mm), 

and 13.5 to 18 in. (343 to 457 mm). Non-raised floor 

applications for the Precision Power Center are not 

CSA approved.

Transient Suppression Plate

The transient suppression plate is a one-square-

meter plate mounted to (and bonded to) the high-

voltage junction box. It reduces the effects of tran-

sients on the ground system by providing a capaci-

tive coupling to building steel.

Phase Rotation Meter

The phase rotation meter is a hand-held instrument 

with clip-on leads for connecting to the circuit under 

test. The meter shows the circuit phase rotation in 

“ABC” or “BAC” sequence.
The phase rotation meter can verify rotation 

sequence of any circuit up to 600 volts.

Table 1

Features available by model

PPC

15-30 kVA

Top Exit

15-30 kVA

PPC

50-125 kVA

Top Exit

50-150 kVA

PPC

150-225 kVA

Panelboards

42 poles 

standard

(one 42-pole 

panelboard)

42 poles 

standard

(one 42-pole 

panelboard)

84 poles 

standard

(two 42-pole 

panelboards)

84 poles 

standard

(two 42-pole 

panelboards)

126 poles 

standard

(three 42-pole 

panelboards)

Flexible Output Cables and 

Terminations

Available

Available

Available

Available

Available

Additional Pole Capacity

Optional 84 

poles

Optional 84 

poles

Optional 126 or 

168 poles

Optional 126 

poles

Optional 168 or 

210 poles

Optional Panelboard Types

Optional

Optional

Optional

Optional

Optional

Subfeed Output Circuit 

Breaker

Not available

Not available

Optional

(up to 225 A)

Not available

Optional

(up to 400 A)

High-Voltage Junction Box 

with Flexible Input Cable

Standard

Not available

Standard

Not available

Standard

Low-Voltage Junction Box 

with Flexible Input Cable

Optional

Not available

Optional

Not available

Optional

Secondary Class Surge 

Arrester

Optional

Optional

Optional

Optional

Optional

Spike Suppression Module

Optional

Optional

Optional

Optional

Optional

Transformerless System

Optional

Not available

Optional

Not available

Optional

Remote Emergency Power 

Off (REPO) Switch

Optional

Optional

Optional

Optional

Optional

K-20 Transformer

Optional

Optional

Optional

Optional

Optional

Multi-Winding Transformer

Optional

Optional

Optional

Optional

Optional

Floor Pedestals

Optional

Not available

Optional

Not available

Optional

Transient Suppression Plate

Optional

Not available

Optional

Not available

Optional