255-250-DNDN-UL YOKOGAWA, 255-250-DNDN-UL Datasheet - Page 8

• Manufacturer Part Number: 255-250-DNDN-UL
• Description: FREQUENCY PANEL METER MODEL 255-2 55-65HZ 240VAC UL
• Manufacturer: YOKOGAWA

Specifications of 255-250-DNDN-UL

• Meter Range: 55Hz To 65Hz
• Meter Size/dimensions: 2.5" X 2.5"
• Scale Length: 2.06"
• Meter Function: Frequency

S
C
A
L
E
2
O
N
L
Y
DC Voltmeters
DC VOLTMETERS — ZERO-LEFT, RATED 0-1 mA DC, FOR USE WITH EXTERNAL RESISTORS.
RESISTORS NOT INCLUDED (SEE PAGE 29 FOR RESISTORS)
Specifications
Accuracy: All DC and AC iron-vane; ±2%
of full-scale AC rectifier type; ±3% of
full scale (with 60 Hz sine wave at 25º C).
When standard 60 Hz iron vane ammeters
are used at the extreme limits of 25 or 400
Hz, additional error (approx. .75%) may be
experienced. Expanded-scale voltmeters:
±.5% of full scale value.
ANSI Specification: All meters meet ANSI
Specifications C-39.1
DC VOLTMETERS — ZERO-LEFT
Rating
& Scale
100 Volts
150 Volts
200 Volts
250 Volts
300 Volts
500 Volts
600 Volts
500 Volts
600 Volts
750 Volts
1.0 Volts
1.5 Volts
10 Volts
15 Volts
30 Volts
40 Volts
50 Volts
80 Volts
3 Volts
5 Volts
8 Volts
Size
Type
Type 250 and 254
New Big Look
250 120 LALA
250 120 LCLC
250 120 LJLJ
250 120 LSLS
250 120 MJMJ
250 120 MTMT
250 120 NDND
250 120 NLNL
250 120 NPNP
250 120 NTNT
250 120 PDPD
250 120 PKPK
250 120 PZPZ
250 120 RLRL
250 120 RSRS
250 120 RXRX
250 104 FASF
250 104 FASJ
250 104 FASM
. . . . . . . . . .
. . . . . . . . . .
1
Band
Taut
1
⁄
2
250 220 LALA
250 220 LCLC
250 220 LJLJ
250 220 LSLS
250 220 MJMJ
250 220 MTMT
250 220 NDND
250 220 NLNL
250 220 NPNP
250 220 NTNT
250 220 PDPD
250 220 PKPK
250 220 PZPZ
250 220 RLRL
250 220 RSRS
250 220 RXRX
250 204 FASF
250 204 FASJ
250 204 FASM
. . . . . . . . . .
. . . . . . . . . .
Band
Taut
New Big Look
Overload: Voltmeters (AC and DC) - 50%
momentary, 20% sustained. Ammeters
(AC and DC) momentary; 10 times the
rated current for 10 consecutive intervals
of .5 second with a 1 minute interval
between successive applications; sustained:
20% for six hours.
Scale Data: 90 degree rotation.
Scale Length:
Size
1
2
3
4
Insulation Level: All meters (except 1
Vrms Hi-pot, 1
Burden Data: AC ammeter-5 amps, 0.5 va,
Max. 0.5 power-factor lagging @ 60 Hz. AC
voltmeter - unity power factor.
Response Time and Overshoot:
Response time: 3 seconds (max.) for 2
3
seconds (max.) for all other DC ratings,
and 2.5 seconds (max) for AC ratings.
Maximum of 40% overshoot.
Dimensions: See page 34-35
1
1
1
1
1
⁄
⁄
⁄
⁄
⁄
2
2
2
2
2
2
"
"
"
"
", 4
1
1
⁄
2
⁄
2
" size for microammeters; 2
Pivot and
254 220 LALA
254 220 LCLC
254 220 LJLJ
254 220 LSLS
254 220 MJMJ
254 220 MTMT
254 220 NDND
254 220 NLNL
254 220 NTNT
254 220 PDPD
254 220 PKPK
254 220 PZPZ
254 220 RLRL
254 220 RSRS
254 220 RXRX
254 204 FASF
254 204 FASJ
254 204 FASM
. . . . . . . . . .
. . . . . . . . . .
. . . . . . . . . .
Jewel
1
⁄
2
"-1500 Vrms Hi-pot.
250 320 LALA
250 320 LCLC
250 320 LJLJ
250 320 LSLS
250 320 MJMJ
250 320 MTMT
250 320 NDND
250 320 NLNL
250 320 NPNP
250 320 NTNT
250 320 PDPD
250 320 PKPK
250 320 PZPZ
250 320 RLRL
250 320 RSRS
250 320 RXRX
250 320 SFSF
250 320 SJSJ
250 304 FASM
. . . . . . . . . .
. . . . . . . . . .
New Big Look
Band
Taut
1.40"
2.06"
2.88"
3.93"
1
⁄
2
1
"), 2600
⁄
2
3
",
1
⁄
2
Pivot and
254 320 LALA
254 320 LCLC
254 320 LJLJ
254 320 LSLS
254 320 MJMJ
254 320 MTMT
254 320 NDND
254 320 NLNL
254 320 NTNT
254 320 PDPD
254 320 PKPK
254 320 PZPZ
254 320 RLRL
254 320 RSRS
254 320 RXRX
254 320 SFSF
254 320 SJSJ
254 304 FASM
. . . . . . . . . .
. . . . . . . . . .
. . . . . . . . . .
Jewel
How To Order
To order New Big Look panel meters use
the appropriate catalog numbers provided
in the tables. Taut band & AC I/V instruments
have a 250 prefix number. Pivot & Jewel
instruments have a prefix of 254.
Ordering Examples:
1. 2
2. 2
3. 2
Notes:
Pivot & jewel instruments are not available in
1
Meter with flame retardant window and base in
2
conform to UL1437. Include /CUL or /UL at
the end of the catalog number or contact
factory.
Sealed meters for outdoor use can be ordered
in 2
the end of the catalog number, or contact
factory. /IEC meters meet IP55.
For ratings and scales not listed contact the
factory. CE compliant.
1
1
⁄
⁄
2
2
" size.
", 3
band - 250 220 RXRX
pivot & jewel, 254 style - 254 220 RXRX
jewel - 250244 RXRX
1
⁄
2
1
1
1
", 3
⁄
⁄
⁄
2
2
2
", 300 V DC Voltmeter, zero left, taut
", 300 V DC Voltmeter, zero left,
", 300 V AC (Iron Vane), pivot &
1
⁄
2
" and 4
1
⁄
2
" and 4
250 420 LALA
250 420 LCLC
250 420 LJLJ
250 420 LSLS
250 420 MJMJ
250 420 MTMT
250 420 NDND
250 420 NLNL
250 420 NPNP
250 420 NTNT
250 420 PDPD
250 420 PKPK
250 420 PZPZ
250 420 RLRL
250 420 RSRS
250 420 RXRX
250 420 SFSF
250 420 SJSJ
250 404 FASM
1
. . . . . . . . . .
. . . . . . . . . .
⁄
2
" sizes are available that
Band
1
Taut
⁄
2
" sizes by including /IEC at
4
1
⁄
2
Pivot and
254 420 LALA
254 420 LCLC
254 420 LJLJ
254 420 LSLS
254 420 MJMJ
254 420 MTMT
254 420 NDND
254 420 NLNL
254 420 NTNT
254 420 PDPD
254 420 PKPK
254 420 PZPZ
254 420 RLRL
254 420 RSRS
254 420 RXRX
254 420 SFSF
254 420 SJSJD
. . . . . . . . . .
254 404 FASM
. . . . . . . . . .
. . . . . . . . . .
Jewel