Toshiba GRL150-100 Series Instruction Manual page 39

THM-A
THM-T
[THMAL]
+
[THMT]
+
THMA_BLOCK
1573
THM_BLOCK
1572
Figure 2.7.1.2 Thermal Overload Protection Scheme Logic
2.7.2 Setting
The table below shows the setting elements necessary for the thermal overload protection and their
setting ranges.
Element Range
THM 2.0 – 10.0 A
(0.40 – 2.00 A)(*)
THMIP 0.0 – 5.0 A
(0.00 – 1.00 A)(*)
TTHM 0.5 - 300.0 min
THMA 50 – 99 %
[THMT] Off / On
[THMAL] Off / On
[THMRST Off / On
]
(*) Current values shown in the parenthesis are in the case of a 1 A rating. Other current
values are in the case of a 5 A rating.
Note: THMIP sets a minimum level of previous load current to be used by the thermal
element, and is only active when testing the element ([THRMST] = "ON").
189
&
188
&
"ON"
"ON"
1
1
Step Default
0.1 A 5.0 A
(0.01 A) (1.00 A)
0.1 A 0.0 A
(0.01 A) (0.00 A)
0.1 min 10.0 min
1 % 80 %
Off
Off
Off
⎯ 38 ⎯
320
THM ALARM
&
321
THM TRIP
&
Remarks
Thermal overload setting.
(THM = I : allowable overload current)
AOL
Previous load current
Thermal time constant
Thermal alarm setting. (Percentage of THM setting.)
Thermal OL enable
Thermal alarm enable
Thermal element test
6 F 2 S 0 8 2 8