FMX TD400-2015-3PH - 3.14 Power Wire Size and Disconnect or Circuit Protection

3-14
3.14 Power Wire Size and Disconnect or Circuit Protection
Refer to section 2.2 for the recommended wire size for each frame of the TD400. Installation of circuit breaker will
depend on the application. Disconnect or Circuit Protection Device must be installed between the input power supply
and the AC Drive input (L1(L), L2, L3 (N)).
Notes:
1. Proper circuit protection should be provided according to NEC and any local codes and regulations.
2. When using a ground protection make sure the current setting is above 200mA and trip delay time is 0.1 sec or
higher.
3.15 Control Circuit Wiring
(1) Isolate wiring for control circuit terminals from main circuit wiring terminals (R/L1, S/L2, T/L3, U/T1, V/T2, W/T3).
(2) Isolate the wiring for control circuit terminals R1A-R1B-R1C or R2A, R2B (Relay outputs) from wiring for terminals
S1 – S6, A0, AGND, +10V, AI1, AI2 and GND wiring.
(3) Use shielded twisted-pair cables (#24 - #14 AWG / 0.5 -2 mm
2
) shown in the figure below for control circuits to
minimize noise problems. The maximum wiring distance should not exceed 50m (165 ft).
Shield
Twisted Pair
Wrap with insulating Tape
Ground Shield at AC Drive
end
O
N
ONLY
DO NOT
L
ONLY
DO NOT
Y
ONLY
DO NOT
D
ONLY
DO NOT
O
ONLY
DO NOT
ONLY
DO NOT
N
ONLY
DO NOT
O
ONLY
DO NOT
T
ONLY
DO NOT
Ground Shield at
this end
3.16 AC Drive derating based on Carrier Frequency
100%
70%
85%
90%
50%
60%
2 4 6 8 10 12 14 16
Current Rating
Carrier Frequency(kHz)
Note:
De-rate curve for ambient temperature of 104°F (40°C)
De-rate curve for ambient temperature of 122°F (50°C)
The curves are showing the applicable output
current de-rate due to setting of carrier frequency
and the ambient operating temperatures of 40 and
50 degrees.
When the carrier frequency is below 10 KHz,
ambient temperature will not affect rated current.
When the carrier frequency is higher than 10 KHz
– If the ambient temperature is below 40°C
(104°F), 100% output rated current at 16 KHz.
– If the ambient temperature is below 50°C
(122°F), 85% output rated current at 16 KHz.
It is required to derate 1.5% of output rated current
each additional degree when the ambient
temperature rises above 50 degrees °C (122°F).