SDV-FM7 AC200/220 Omron, SDV-FM7 AC200/220 Datasheet - Page 110

• Manufacturer Part Number: SDV-FM7 AC200/220
• Description: Sensor Hardware & Accessories VOLTAGE SENSOR
• Manufacturer: Omron

Specifications of SDV-FM7 AC200/220

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Q&A
Q: How does the K6EL operate when used for inverter loads (e.g., inverter motors and inverter air conditioners)?
A: The influence of high-frequency noise generated by the inverter has been reduced by combining a special ground
Q: What connection method should be used for ungrounded electrical paths?
A: With ungrounded electrical paths, connect the capacitor or resistor for detection in the way shown in the diagram.
108
R
S
T
Cat. No. N126-E1-01
Single-
phase
electrical
path
fault relay IC and a capacitor for cutting out high-frequencies. The possibility of malfunctions due to the influence
of the inverter is much less than with the existing ESA Ground Fault Relay.
The table shows the formulas for calculating the resistance or capacitance as well as the formulas for calculating
ground currents for complete ground faults. (Depending on the location, the allowable ground fault current may be
restricted. In this case, use values of R and C that do not exceed the restrictions.)
Resistor (R) or
capacitor (C)
Ground Fault Relay
K6EL
Isolating
transformer
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Inverter
Connection method
OTG ZCT
kt
Rg
l
In the interest of product improvement, specifications are subject to change without notice.
k lt
K6EL
Ig
K6EL
M
Y/b
Y
Rg
Resistor:
Capacitor:
Dielectric strength
> 2 V (V)
R=
C=
P=
Formula for resistor or capacitor
5V
2It
2 fV
R
V
2It
2
( )
(W)
(F)
It: Ground Fault
V: Line voltage
f: Frequency
P: Allowable
(A tolerance is
included in the
formulas on the
left.)
Relay’s set
value
power for the
resistor used
Ig=
Formula for ground
Ig=
(2Rg)
2Rg + R
current
2
V
+ (
V
2 fC
1
(A)
)
2
(A)
safety ground
Ig = 2 fCV (A)
Formula for
Ig=
fault
V
R
(A)