Toshiba Model RC820 Solid State Motor Protection Relay

Toshiba Updated: 2007-07-18
Toshiba Model RC820 Solid State Motor Protection Relay

When motor protection needs are not quite as elaborate, this relay combines reliable protection against overloads and single phasing with a simple, easily adjustable design. As a motor overload protection relay, the 2E is adjustable from Class 3 through Class 40 to provide optimum protection and to accommodate reduced voltage starting and high inertia loads. Ground fault and phase reversal modules are available.

MODEL NUMBER  RC820-
H/AP1Y  H/AP2Y  H/AP3Y
Applicable Circuit  Three phase circuits, 50/60 Hz, 600Vac Above 600Vac with CTs
Protective Functions  Overload and single phase protection
Rated Current  Rated ampere-turns  7AT  55AT  110AT
Setting range  75 ~ 150% of rated AT
Overload Operating characteristics  Ultimate trip current  105 ~ 125% of setting current
Operating time setting range  3 ~ 40 sec. for cold starting characteristics at 600% of setting current
Single Phase Operating Characteristics  Minimum Operating current  85% of setting current must be flowing in the conducting phase
Operating time  less than 4 sec.
Control Voltage  Rating  Std 100 ~ 120/200 ~ 240V AC 1f , 50/60 Hz
Tolerance  85% - 11%
Output Contact Specifications  Contact arrangement  1NO/NC (Form C)
Contact capacity NEMA B300  120VAC - 5.0A (Resistive load)
120VAC - Make 30A / Break 3A
240VAC - Make 15A / Break 1.5A
125VDC - 0.2A (L/R = 7 ms)
250VDC - 0.1A (L/R = 7 ms)
Power Consumption  Control power circuit  2VA
Detecting circuit  0.3VA / phase at rated current
Application Conditions  Ambient temperature  -10 ~ + 60oC
Relative humidity  45 ~ 85% at 20oC
Additional Specs RC81A*  RC81B  RC81C*
Phase reversal characteristics  Operating current  -  90% of 2E relay setting current  90% of 2E relay setting current
Operating time  -  Less than 0.5 sec.  Less than 0.5 sec.
Ground fault characteristics  Ground fault current setting 4A ~ 12A
ZCT Primary  -  4A ~ 12A
ZCT Primary
Max. ground fault current  60A  - 60A
Ground fault time setting  0.1 TO 1.0 sec.  -  0.1 TO 1.0 sec.
Output signal  Output contacts of basic relay
Trip indication  LED (manual reset)