CSM_APR-S_DS_E_3_3
1
Reverse Protection Relay
APR-S
Uses Voltage Detection to Determine
Reverse Revolution of Three-phase Motor
• Detects motor reversal due to incorrect wiring.
• Direction of motor revolution is detected as soon as power is ap-
plied to the Relay. If the power is reversed, the magnetic con-
tactor locks in the open state.
• The magnetic contactor can also be wired to protect it from be-
ing closed in open phase.
• Small, plug-in Relay that needs no adjustment.
• Uses voltage detection method to operate independently of load
current.
APR-S (200/220 V) APR-S380 (380/400 V)
APR-S440 (440 V)
Model Number Structure
■Model Number Legend
1. Reverse Protection Relay 2. Control Power Supply Voltage
None: 200/220 VAC
380: 380/400 VAC
440: 440 VAC
Ordering Information
■List of Models
■Connecting Sockets (Order Separately)
12
APR-S@
Supply voltage Model
200/220V APR-S
380/400V APR-S380
440V APR-S440
Applicable model Socket Mounting bracket
Type Model Model
APR-S Front-mounting socket PF083A PFC-A6
Back-mounting socket PL08 PLC-7
APR-S380
APR-S440
Front-mounting socket P2CF-11 ---
Back-mounting socket PL11 Y92H-1
APR-S
2
Specifications
■Ratings/Characteristics
Connections
To Detect Reverse Phase or Open
Phase
Operation
•Suppose the motor revolves in the forward direction when the input
terminals F, D, and C of the APR-S are connected, in this
sequence, to the power lines. The APR-S Relay turns ON when the
phase sequence of the voltage is in the forward direction, that is,
when the power lines R, S, and T are energized in this sequence.
When the Relay turns ON, terminals E and A conduct, energizing
the contactor. If one of the three phases is reversed, the Relay
does not turn ON and the contactor is not energized.
•To protect the motor from damage due to open phase, the wiring
must be performed in exactly the same way as shown in this figure
(i.e., so that the phase connecting the contactor coil is not the same
as the phase connecting terminal D of the Relay).
If phase R or T is open, the contactor does not operate because
one side of its coil is not energized. If phase S (connected to termi-
nal D of the Relay) opens, the Relay does not turn ON, allowing no
current flow between terminals E and A. The contactor therefore
does not operate.
Note, however, that the contactor is prevented from operating by
preventing an open-phase voltage from flowing into the motor and
not by the open-phase protection feature of the Relay.
Note: Open-phase detection is only possible when a 200/220-VAC
APR-S is used with the wiring exactly the same as shown in the
above diagram.
To Switch to Reverse Phase
Operation
•Suppose the motor revolves in the forward direction when the input
terminals J, A, and C of the APR-S are connected, in this
sequence, to the power lines R, S, and T, respectively. The APR-S
Relay turns ON when the phase sequence of the current is in the
forward direction, that is, when the power lines R, S, and T are
energized in this sequence. When the Relay turns ON, terminals F
and G conduct, energizing the contactor. If one of the three phases
is reversed, the Relay does not turn ON, and terminals F and G
do not conduct, but a current flows between terminals F and H,
energizing the reverse-phase contactor.
Note: Open-phase detection is not possible.
Type APR-S APR-S380 APR-S440
Supply voltage 3-phase, 200/220 VAC, 50/60 Hz 3-phase, 380/400 VAC, 50/60 Hz 3-phase, 440 VAC, 50/60 Hz
Operating voltage range 170 to 240 VAC 350 to 420 VAC 410 to 460 VAC
Operate time 100 ms max. (Until detecting positive phase or reverse phase after applying voltage)
Control output 1.1 A at 200 VAC, cosφ = 1, SPDT
2 A at 115 VAC, cosφ = 1
0.6 A at 200 VAC, cosφ = 0.4
1.2 A at 115 VAC, cosφ = 0.4
1.1 A at 250 VAC, cosφ = 1, SPDT
0.6 A at 250 VAC, cosφ = 0.4
Insulation resistance 100 MΩ min. (at 500 VDC)
Dielectric strength 2,000 VAC, 50/60 Hz for 1 min
Shock Malfunction: 98 m/s2 (approx. 10 G)
Ambient temperature −10 to 50 °C
Life expectancy Mechanical: 1,000,000 operations min.
Electrical: 100,000 operations min.
Weight Approx. 100 g
3
2
45
6
7
81
Power supply
200/220 VAC
RST
APR-S Reverse
Protection Relay
Contactor
M
Power supply
380/400 VAC
RST
APR-S380
Contactor
M
Conductor control
power supply
Note: Use separate power supplies
for the contact’s applied volt-
age and control voltage.
APR-S
3
Accessories (Order Separately)
■Dimensions
■Terminal Arrangement
50
38 63.9
77.5 13.6
APR-S
APR-S
PF083A (Order separately)
PL08 (Order separately)
84.9
68.9
16
APR-S
APR-S380/S440
48
48
0.7 13.6
44.8 × 44.8
78
63.7
6
1
P2CF-11 (Order separately) PL11
(Order separately)
103
APR-S380
77
16
APR-S380 Y92H-1
Hook
(Bottom View)
APR-S
(Bottom View)
APR-S380/S440
4 5
6
7
81
2
3
567
8
9
10
1
11
2
4
3
APR-S
4
■Accessories for Track Mounting
4.5
15 15 (5)*
7.3±0.15
35±0.3 27±0.15
1
10 1025 25 2525
1,000 (500)*
PFP-100N/PFP-50N Socket Mounting Track
* The dimensions given in parentheses are for the PFP-50N Socket Mounting Track.
4.5
15 15
10 1025 25 2525
1000
1 1.5
29.2
16
2427
35±0.3
PFP-100N2 Socket Mounting Track
5
44.3 34.8
12
16
16.5
Spacer
APR-S
5
Safety Precautions
■Correct Use
•
With the APR-S, APR-S380, or APR-S440 an open phase at startup can be
prevented only if connections are external and wiring has been performed to
detect reverse phase and open phase at startup when the power supply is
turned ON. When doing so, use an SE Static Motor Relay. An open phase
when the power supply is turned ON can be detected only when it occurs
between the APR-S, APR-S380, or APR-S440 and the power supply. An open
phase cannot be detected on the load side.
•
Suppose the motor revolves in the forward direction when the input terminals 6,
4, and 3 of the APR-S are connected, in this sequence, to the power lines. If the
phase sequence of the power supply applied to the APR-S is a positive
sequence (i.e., applying to R to S to T in the order of 6 to 4 to 3), the relay built
into the APR-S will turn ON, there will be continuity between terminals 5 and 1,
and the contactor will be energized. For reverse phase, the built-in relay will not
turn ON and the contactor will not be energized.
•
The positive phase sequence for the APR-S380 or APR-S440
corresponds to the following order of the input terminals: 10 to 1 to 3.
If the phase sequence of the power supply applied to the APR-S380 or APR-
S440 is a positive sequence (i.e., applying to R to S to T in the order of 10 to 1
to 3), the relay built into the APR-S380 or APR-S440 will turn ON, there will be
continuity between terminals 6 and 7, and the contactor will be energized.
For reverse phase, the built-in relay will not turn ON and the
contactor will not be energized.
•An open phase when the power is turned ON cannot be detected
by the APR-S380 or APR-S440.
•
An open phase when the power is turned ON can be prevented when
wiring is performed exactly as in the following figure (when wiring is
performed so that the phase of the connected contactor coil for turning
ON the power supply and the phase of the connected terminal 4 of the
APR-S, APR-S380, or APR-S440 are not the same phase).
Operation Chart
Example: APR-S380
In the figure above, one side of the contactor coil will not be energized
if either phase R or phase T is open phase, so the power supply will not
turn ON. For open R phase (APR-S terminal 4), the built-in relay of the
APR-S will not turn ON, and there will be no conductivity between
terminals 5 and 1, so the contactor will not operate, and the power
supply will not turn ON.
This protection is for an open phase when
the power is turned ON and cannot ensure detection of an open
phase when the motor is operating.
•
Incorrect wiring on the magnet contactor load side cannot be detected.
•
A phase detection method is used, so usage is not possible with single phase.
Mounting
•If a back-mounting socket is used for mounting, mount the socket
flush from the back of the panel (thickness: 1 to 4 mm) using
screws, and insert the APR-S after the socket is sufficiently
tightened. Make sure the socket is mounted with the key slot
downward.
•If a front-mounting socket is used, mount the socket to the panel
using screws, and insert the APR-S after the socket is sufficiently
tightened.
•Use a mounting bracket to secure the APR-S reliably and prevent
contact faults.
Example Circuit for Ensuring a Positive
Phase Voltage Supply to the Motor
•Suppose the motor revolves in the forward direction when the input
terminals 6, 4, and 3 of the APR-S are connected, in this sequence
to the power lines, R, S, and T, respectively. If the phase sequence
of the power supply applied is the positive sequence, the relay built
into the APR-S will turn ON, there will be continuity between
terminals 5 and 1, and the positive-phase power-ON contactor will
be energized.
For reverse phase, the built-in relay will not turn ON, there will be
conductivity between terminals 5 to 8, and the reverse-phase
power-ON contactor will be energized. In this way, the voltage
supplied to the motor will remain positive phase whether the
voltage applied is positive phase or reverse phase.
•This circuit cannot be used to switch between forward and reverse
motor directions.
Positive-phase Voltage
Input voltage
AC380V
Continuity
No continuity
Continuity
No
continuity
Positive phase
Reverse phase
Between terminals
6 and 7
Between terminals
6 and 8
Input voltage
Positive phase
Reverse phase
Between terminals
6 and 7
Between terminals
6 and 8
AC380V
Continuity
No continuity
Reverse-phase Voltage
RST
45
6
7
81
2
3
M
Power supply
200/220 VAC
APR-S Reverse
Protection Relay
Contactor
Note
The APR-S requires 100 ms after the voltage has been applied
until positive phase and reverse phase are detected. Be sure to
allow at least 100 ms to elapse before applying voltage to the
control power supply after applying voltage to the APR-S.
3
2
45
6
7
81
RST
Positive-phase
power-ON
contactor
M
Reverse-phase
power-ON contactor
M2M1
Power supply
200/220 VAC
APR-S
Reverse
Protection
Relay
Control
power
supply
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
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2018.7
In the interest of product improvement, specifications are subject to change without notice.
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